7th grade science research project ideas

All Science Fair Projects

1000 science fair projects with complete instructions.

72 Science Projects for 7th Graders

Looking for engaging science fair projects for a middle school science fair? Our handpicked collection of science fair projects for 7th graders is a great place to start!

7th Grade Science Fair Project FAQ

What are some easy 7th grade science fair projects.

Each of these science fair projects are easy for seventh grade science students do. Explore how glow-in-the-dark sticks work, discover how far apart planets really are, and make your own geode crystal with borax!

Chocolate Asphalt

Making Lightning in a Pan

Glow Sticks: Temperature Effects

Geode Rock Borax Crystal

Does Cooking Deplete Vitamin C?

Solar System Scale Model on the Sidewalk

Color and Taste

Uncovering Fall Colors

Growing Mold

Carbonation and Packaging

Science fair project details right above the FAQ!

What is the best 7th grade science project ever?

We love the Fast Food Nutrition project for seventh grade science students. This project encourages students to look more closely at the nutritional value of fast food that's easily available. This project is not only a research project on fast food nutrition, but it also gives middle school students the opportunity to interview willing test subjects about their eating habits.

If you're looking for more 7th grade science projects, check out the 7th grade science fair projects at the top of this page! 

Check out more Best Science Fair Projects →

What are some cool 7th grade science fair projects?

Get ready to be amazed by these super cool science projects for 7th graders! With just a few simple materials, students fascinated by the solar system, how things glow-in-the-dark, unexpected chemical reactions and more, will have too much fun!

Glowing in the Dark

Make Plastic from Milk

The Dissolving Meat Myth

What are 5 testable questions for 7th grade?

A testable question is a question that we can answer through a science experiment. To do this, we do a control science experiment, then we change one thing in the experiment to see how it affects what happens. This is how we can discover the answer to our question!

Here are some testable questions that our seventh grade science projects investigate.

Do detergents affect plant growth?

Can drink and food taste different just by changing its color?

Does the color of light affect photosynthesis?

Does temperature affect seed sprouting?

What makes popcorn pop?

Here are more testable questions along with their science projects →

What are the top 10 science projects for 7th grade?

These are our top 10 science projects for 7th grade, covering biology, chemistry, physics and engineering. Find out how sugary drinks affect teeth, make electricity with your own body or test your design and engineering skills by making a foil bug walk on water! These projects can be used as science fair project ideas or as a fun experiment!

Hamsters and Time of Day

Plant Density and Growth Rate

Water Strider Challenge: Make a Bug Walk on Water!

Human Body Battery

Left-Handedness and Mirror Writing

Making Antibubbles

Soil as an Electrical System

Tooth Decay Experiment with Eggs

Science project details right above the FAQ!

Can I do a 7th grade science fair project in a day?

Yes! Quick experiments or making a model can be a great option for a science fair project! If you want to do a quick science fair project, we have science project ideas on various topics to get you started.

The Solar System: See it in the correct scale!

Create your own sidewalk chalk solar system model and take a walk through space! Solar System Scale Model on the Sidewalk

Chromatography reaction: Separating out colors!

Have you ever wondered why leaves change color in the fall? Let's find out by in this chemistry experiment using chromatography to separate the colors of a green leaf! Uncovering Fall Colors

Heat reactions: Heat speeds things up!

Does the temperature of a room affect how quickly a candle burns? Burn Rate of a Candle

What are some hands-on ways to find inspiration for my science fair project?

There may be free admission days or free passes to a science museum near you! Check your local library for free museum passes, nearby science museums for free entrance days and your credit card for offers.

Find a science museum near you and prepare to be awed by all that you can learn there! I always learn something new and am inspired whenever I go to a science museum!

How do I start a science fair project?

What should I do after I have a science fair project idea?

How do I make a science fair board?

What is the scientific method?

What is the engineering design process?

Where can I find a science fair competition?

The www Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!

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Teaching Students About Diode Symbols

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Are you looking for science activities to do with your 7 th graders? No sweat. We have you covered. Check out our list of 43 science projects and experiments that you can try with your 7th graders this month.

• Yeast Metabolism with and without Aeration | Sciencebuddies.org – Grades 6-8 Biology experiment that evaluates the effects of glucose metabolism in yeast.
• Aspirin Absorption in Carbohydrate Solutions | All-Science-Fair-Projects.com – Grades 6-8, Does aspirin absorb into the bloodstream quicker if taken with a carbohydrate food? Test aspirin dissolution in an assortment of carbohydrate solutions.
• Bacteria and Toothpaste | All-Science-Fair-Projects.com – Grades 6-8, Do you know which toothpaste cleans your teeth best? In this project, you will row bacteria from your recently brushed teeth in petri dishes to find out the answer.
• Making Batteries from Fruits and Vegetables | Sciencebuddies.org – Grades 4-7, Use veggie power to build a simple battery from a variety of vegetables. Which ones are the most powerful?
• How Do Roots Grow When the Direction of Gravity Changes? | ScienceBuddies.org -Grades 6-10, Plants respond to gravity by stems that grow upward and roots that grow downward. Experiment with germinating seeds and rotate them to make up down and down up. How do you think the growing seedlings will respond?
• Hydroponics vs. Soil Growth | All-Science-Fair-Projects.com – Grades 6-8, In this project, students find out if plants grow better in soil or a hydroponic solution.
• Puppy Proportions: Your Dog’s Early Months | Sciencebuddies.org – Grades 6-8, Find out how a puppy’s weight, growth, and proportions change early in their lives.
• Do Migratory Birds Like It Hot? | Sciencebuddies.org – Grades 6-8, Pick a species of bird and determine if there is a correlation between air temperature and where and when the birds migrate.
• That’s a Real Smile! …or is it? | ScienceBuddies.org – Grades 6-8, Can people tell the difference between a fake smile and a real one? Gather information from dozens of volunteers to find out.
• Build a Raft Powered by Surface Tension | Sciencebuddies.org – Grades 6-10, Learn about the properties of surface water tension, and use it to propel a raft.
• Paw Preference in Pets | Sciencebuddies.org – Grades 7-10, Are animals left-handed or right-handed like humans?
• Bat Detector: Listen to the Secret Sounds of Bats | Sciencebuddies.org – Grades 7-10, Study the behavior of bats to find out how do they use echolocation to catch their prey
• Saving Migratory Animals | ScienceBuddies.org – Grades 7-10, They’re here today but could be gone tomorrow. Examine the migratory path of a bird species and the similarities and differences between their winter and summer habitats. Recommend which locations should be preserved to protect these species.
• Which Metal Is the Most Resistant to Corrosion? | Sciencebuddies.org – Grades 6-8, Test several kinds of metal exposed to the air, tap water, and saltwater to determine which are the most resistant to corrosion, and which substances are the most corrosive to them.
• Ionizing vs. Photoelectric Smoke Detectors | All-Science-Fair-Projects.com – Grades 6-8, Learn how smoke detectors work, and compare the effectiveness of ionizing smoke detectors to photoelectric smoke detectors.
• Robot Movement | Education.com – Grades 6-8, Construct a robot equipped with sound/touch sensor circuitry. Run it through a maze to find out if it displays sequential or random movement.
• Repurposed Designs | Education.com – Grades 6-8, Identify items that need repurposing such as e-waste, batteries, and mattresses. Then get creative and Invent your own original repurposed design.
• Solar-Powered Robot Bug | Sciencebuddies.org – Grades 6-8, Explore electronics and solar energy by building the Frightened Grasshopper, a solar-powered bug.
• Stressed Out with Beams | Sciencebuddies.org – Grades 6-8, Test the load-bearing capacity of several types of beams, including I-beams, U-beams, rectangular beams, and T-beams.
• Build a Gauss Rifle | ScienceBuddies.org – Grades 6-8, Use magnets and ball bearings to build a rifle based on magnetism. Investigate how many magnet and ball bearing “stages” affect the velocity and distance of the projectile.
• Smart Medicine Cabinet | ScienceBuddies.org – Grades 6-8, Do you know someone who needs to take medication daily? Create a sensor that reminds patients when to take their medication.
• electromagnet?
• Grow the Best and the Largest Crystals | Sciencebuddies.org – Grades 6-8, Figure out the best temperature for making the largest, purest crystals using water and borax.
• What’s the Fastest Way to Cool a Soda? | ScienceBuddies.org – Grades 6-8, Experiment with different ways to cool a can of soda.  Find out the fastest way to get your tall cold drink.
• How Much Potential Energy Do Different Nuts Have? | Education.com – Grades 6-8, Explore the energy of living things. Prove that different varieties of nuts produce electricity in a series of experiments.
• How Salty Does the Sea Have to Be for an Egg to Float? | ScienceBuddies.org – Grades 6-8, Figure out precisely what concentration of salt in water is required to make an egg float.
• Washing Detergent & Hydrophobic Soil | Education.com – Grades 6-8, Some soils do not absorb water very well.  Find out why and if washing detergent and change their ability to absorb water.
• Make Your Own Psychrometer | Sciencebuddies.org – Grades 6-8, Make a psychrometer to measure relative humidity, then use it to measure RH in a variety of weather conditions.
• Do Our Storm Drains Keep the Ocean Trash Free? | ScienceBuddies.org – Grades 6-8, Test your local grated storm drain inlets to see if they’re up to the task of keeping plastic litter out of your community’s stormwater drainage system. If they’re not, work on improving the design.
• Can Water Float on Water? | ScienceBuddies.org – Grades 6-8, Can liquid water float on liquid water? Investigate how the density of water is affected by its temperature and salinity.
• What Weather Factors Create Radiation Fog? | Sciencebuddies.org – Grades 6-8, Make systematic observations about the weather conditions needed to create radiation fog. Can you forecast when and where it will occur?
• The Science Behind Tsunamis | Sciencebuddies.org – Grades 6-8, Study the effect of water depth on wave velocity. Learn how tsunamis form and create your own simulation model wave tank to generate a tsunami.
• Killing ‘Vampires’: Saving Money and Power | Sciencebuddies.org – Grades 6-8, In this project, you’ll identify electricity “vampires” in your home, such as computer peripherals and electronic equipment, that use power even when not in use. Find out exactly how much energy they use. Use this eye-opening data to help your family save money on electricity.
• Which Wheels Work Best? | Education.com – Grades 6-9, Experiment with how different kinds of wheels affect the speed of a skateboard.  You’ll calculate friction co-efficient and its correlation to velocity.
• Test the Efficiency of a Solar Cell? | Education.com – Grades 6-9, Find out how much of the energy from the sun that reaches a photovoltaic cell is changed over into electricity.  Predict how to position solar cells for maximum conversion.
• How Acidic Waters Make Rocks Disappear | Sciencebuddies.org – Grades 6-10, Soak some limestone rocks in varying amounts of acidic water.  Determine how much acidity is needed to make them dissolve.
• Seafloor Spreading | Education.com – Grades 6-12, Use an oatmeal box and some paper to demonstrate seafloor spreading.
• Storytelling Alice | Sciencebuddies.org – Grades 6-12, Create your own computer-animated story using Carnegie Mellon’s 3D programming software. You’ll learn computer programming with easy-to-use drag and drop tools.
• Modeling Darcy’s Law | Education.com – Grades 6-12, Model the underground movement of water, utilizing Darcy’s Law.
• Globular Clusters | Sciencebuddies.org – Grades 7-10, Explore “star gangs” in the Milky Way and beyond. Globular cluster are compact groups of about a million stars that move around in galaxies. Use statistical data to learn how globular clusters help us better understand the universe.
• Demonstrating the Separation of Mixtures | Education.com – Grades 7-10, Separate recycled objects to illustrate how mixtures are created.
• Customize Your Own Drum Set! | ScienceBuddies.org – Grades 7-10, Build a drum set using household materials, a computer, Scratch, and a PicoBoard. Program your drum set to create a synthesized Hip hop, rap, classical, techno, or electronic drumbeat.
• Harmful Algal Blooms in the Chesapeake Bay | Sciencebuddies.org – Grades 8-12, Harmful algal blooms affect the quality of water and impact people, marine animals, and birds. Study how water quality changes before, during, and after algal blooms.

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Science Fair Ideas for 7th Grade – 60 Perfect Projects

June 27, 2024

If your 7th graders are preparing for the science fair, it’s possible that you’re looking for some ideas to get them started. With these 7th grade science projects, your students will be sure to feel inspired and ready to begin. These science fair ideas for 7th grade include projects related to biology, health & psychology, environmental science, chemistry, physics, and engineering.

Things to consider – Science fair ideas for 7th grade—60 perfect projects

Each of these projects is ranked according to “difficulty” and “materials.” You can consider these rankings as you decide which to share with your 7th grade students.

Difficulty : How advanced is the project? Do your 7th graders have enough time to complete it? Each project is rated “basic,” “medium,” or “advanced” based on the complexity of the concept and the amount of time it will take.

Materials : These projects also range in terms of the complexity of the materials and setup, and are ranked as “basic,” “medium,” or “advanced.”

Biology – Science Fair Ideas for 7th Grade—60 Perfect Projects

1) extracting dna from onions.

  Can DNA be studied separately from other cell components? In this experiment, students creatively use a variety of household supplies to learn more about DNA, an important biology concept.

• Difficulty: advanced
• Materials: advanced
• Learn more: onion DNA extraction

2)  Grow box design

  Build a grow box (or series of grow boxes) for plants using cardboard, foil, and a plug-in light source. Students can test the effectiveness of the grow box when variables are changed, such as light source strength and box size. After this experiment, your students can invite plants into their homes or the classroom all winter long.

• Difficulty: medium
• Materials: medium
• Learn more: DIY grow box

3) Collect biofilm

  Biofilm is comprised of microscopic bacteria accumulating on objects in the water (you might notice it rivers, swimming pools, or even on the surface of teeth). Students can quantify biofilm by building a collector. They can also experiment with ways to reduce it.

• Learn more: biofilm experiment

Science Fair Ideas for 7th Grade – 60 Perfect Projects (Continued)

4) plants and phototropism.

  Do plants really grow towards light? Discover more about how plants respond to light through this simple experiment.

• Difficulty: basic
• Learn more: phototropism

5) Nitrogen and plants

Explore the important role of nitrogen in plant growth with this science fair project. The experiment involves comparing the growth of pea plants with and without nitrogen-fixing bacteria.

• Learn more: nitrogen and pea plants

6) Bubble cell membranes

  If you’re looking for a fun way to teach 7th graders about cell membranes, consider using bubbles. Through this lab, students investigate the behavior of bubbles and apply it to cell membrane characteristics.

• Learn more: cell membrane bubble lab

7) Test Darwin’s theory

  With this lab, students repeat Darwin’s “survival of the fittest finch” experiment for a fun and interactive way to learn about natural selection and evolution.

• Learn more: natural selection lab

8) Carbon cycle experiment

  Help your 7th graders learn about processes of photosynthesis and respiration through this project that combines biology and chemistry concepts.

• Learn more: carbon cycle experiment

9) Test for germs

  What’s the dirtiest place in the kitchen? The refrigerator handle? The coffee machine? The sink? Students can guess, though it might not be what they think. Swab household items and store the samples over several days to find out.

• Learn more: germ experiment

10) Cell size lab

  In this project, students can analyze surface-area-to-volume ratios using beets and bleach, demonstrating how small cells are more efficient at moving materials in and out.

• Learn more: cell size lab

Health and psychology – Science Fair Ideas for 7th Grade

11)  colors and memory.

  Find out how color affects memory by asking volunteers to recall simple words on differently-colored construction paper.

• Materials: basic
• Learn more: color influencing memory

12) Measuring tooth decay

  Since eggshells share similar properties to teeth, your students can use them to test how different beverages erode tooth enamel. This project teaches biology concepts while also encouraging healthy eating and dental care.

• Learn more: tooth decay egg experiment

13) Cooking and Vitamin C

  Do cooked fruits and vegetables have less Vitamin C than raw ones? This is another good experiment for your students interested in nutritional science. This project involves a slightly more complex procedure, so it’s also perfect for your advanced 7 th grade students.

• Learn more: Vitamin C determination

Science Fair Ideas for 7th Grade (Continued)

14) caffeine and typing.

  Does a jolt of caffeine help you work more efficiently? Test this out through typing with this 7 th grade science experiment. Your 7 th grade students can run this test with mild forms of caffeine, such as soda or a piece of chocolate.

• Learn more: caffeine and typing

15) Psychology and texting language

  If you teach 7 th graders, you may have heard them speaking in texting-speak. Have these texting abbreviations become a full language? With this project, your 7 th grade students can create a text-language glossary and study its practical applications.

• Learn more: is texting a new language?

16) Test calorie counts

  Where does the calorie number on packaged foods come from? Try this experiment with a variety of foods to help your students understand how food energizes us.

• Learn more: test calorie counts

17) Balloon lung capacity

  Using a balloon and a tape measurer, students can measure lung capacity, which has a number of health implications. It can be made more or less complicated depending on the measurements taken (circumference vs. volume of the balloon, for example).

• Learn more: measuring lung capacity

18) Myers-Briggs and memory

  Are your students interested in exploring questions of psychology and memory? This experiment involves asking volunteers to take a Myers-Briggs personality test, followed by a simple memory exam. They only need internet access and willing volunteers.

• Learn more: memory and personality

19) Flexibility experiment

  There are a number of reasons for stretching, including reducing chances of injury and feeling calmer. But does stretching actually make us more flexible? Find out by comparing flexibility before and after stretch exercises. Students can test volunteers after holding the stretches for different lengths of time.

• Learn more: flexibility experiment

20) Sleep and memory

  Can sleep deprivation affect memory? Your students can find out by quizzing volunteers on trivia studied beforehand after 8 or 5 hours of sleep. While this project takes some planning, organization, and willing volunteers, it’s a fun way to promote healthy sleep habits.

• Learn more: sleep and memory

Environmental science – Science Fair Ideas for 7th Grade

21) water filtration.

Create a charcoal filter in order to better understand water filtration systems. Afterwards, students discuss the science behind clean drinking water, as well as its environmental implications.

• Learn more: charcoal water purifying experiment

22) Acid rain and plant life

  Does acid rain negatively affect plants? Students can test this environmental concern using vinegar. Advanced students can also experiment with different pH levels for a more complex project.

• Learn more: acid rain experiment

23) Ocean acidification

  For another project related to acidification, students can make stimulated ocean water and test its effects on seashells.

• Learn more: ocean acidification lab

24) Test the greenhouse effect

  Though the greenhouse effect can help planet Earth to stay at a livable temperature, it also causes harmful global warming when enhanced by excess greenhouse gases. With this model, students can see the greenhouse phenomenon in action, and discuss how humans could reduce greenhouse gas emissions.

• Materials: simple
• Learn more: greenhouse effect experiment

25) Grow garbage plants

  Grow plants using different kinds of compost and garbage to see which kind of matter facilitates the quickest growth. This project is a great way to teach about composting and sustainability.

• Learn more: growing plants in garbage

26) Water cycle bags

7th grade students can learn more about the water cycle with only a Ziploc bag, food coloring, water, and a marker. Once these water cycle bags are created, they can be hung by a window and checked throughout the following days. Students can observe and record a miniature water cycle happening before their eyes. For more complexity, they can check it at different temperatures.

• Learn more: water cycle bags

27) Glacier ice-cutting

For a demonstration of how glaciers melt from pressure, try this ice-cube-cutting experiment. Mix it up by timing the process with differently sized ice-cubes and weights.

• Learn more: ice cube vs. wire

28) Water quality testing

  A simple water testing kit opens numerous possibilities for science fair projects, including testing the water quality of local streams, ponds, swimming pools, and drinking-water taps. If students don’t have water testing kits on hand, they can purchase them for under $30. This is a perfect way to teach about the importance of clean water sources.

• Learn more: water quality experiment

29) Algae growth

  Teach students about fertilizer runoff and its harmful impacts on local waterways through this experiment, which has students test the effects of pollutants on algae growth using household fertilizers.

• Learn more: algae and pollution

30) Bird watch

  Project FeederWatch is perfect for students who might take an interest in ornithology. It only involves putting a bird feeder outside and recording the number of visitors. For more complex studies, students can take on Feeder Design Challenges .

• Learn more: bird feeding with Project FeederWatch

Chemistry – Science Fair Ideas for 7th Grade

31) slime design.

  Chances are, you already know that middle school students love slime. Turn the fascination into a learning activity by experimenting with chemical properties to create the best slime.

• Learn more: how to make slime

32) Mummify a hot dog

  Students can understand the chemical processes involved in mummification by completing this simple experiment.

• Learn more: hot dog mummification

33) Eggshell chalk

Your 7th graders can make their own sidewalk chalk by using the calcium in eggshells. They can change variables (flour type, water temperature, etc.) to see which chalk is the most long-lasting or water-resistant.

• Learn more: make your own eggshell chalk

34) Homemade ice cream

  The secret to making ice cream is to lower the freezing point of ice. The secret to this secret? Salt. With this experiment, students can have delicious vanilla ice cream ready in about 20 minutes. Test different ingredients for the creamiest results.

• Learn more: homemade ice cream

35) Saltwater and density

Explore salinity by making an egg float or sink in water with various salt levels. You can base your salt levels on notorious salty bodies of water such as the Great Salt Lake (6-27% salt water) and the Dead Sea (34% salt water).

• Learn more: egg float science experiment

36) Oxidation experiment

  Ever wondered how to slow or prevent rusting? Rusting occurs through a process of oxidation, which can be slowed using different liquids. Test how saltwater, freshwater, and other liquids affect oxidation on common metal objects (paper clips, staples, coins, etc.)

• Learn more: does it rust?

37) Static water bending

  Change the flow of water just by combing your hair and then holding it next to a stream of water. How far can you bend the water by combing your hair for different lengths of time? This is a great way to help 7th graders understand static electricity.

• Learn more: bending water experiment

38) Blow bubbles

  Yes, bubble-blowing can be a science fair project. Ask your students to test how temperature affects bubble life through this fun experiment.

• Learn more: bubble life and temperature

39) Red cabbage pH indicator

  Explore chemistry by testing the pH of liquids such as vinegar, milk, and coffee. You’ll need cups and bowls, and of course, red cabbage.

• Learn more: red cabbage indicator experiment

40)  Plate coins with copper

  Create copper-plated coins by extracting copper from a solution, through processes of electrolysis and electroplating . This is a fun way to combine chemistry and electrical engineering.

• Learn more: copper plated coins

Physics Projects – Science Fair Ideas for 7th Grade

41) balloon temperature.

  Using this simple and visual balloon experiment, students can better understand how air expands when heated, a basic component of thermodynamics.

• Learn more: balloon temperature experiment

42) Floating tea bags

  To teach your students about heat and its effects on air molecules, give them this tea bag experiment. Since this project involves fire, you should make sure your students have adult supervision while conducting the experiment. It’s also great for a class demonstration.

• Learn more: floating tea bags

43) Build a parachute

  7th graders can learn about speed, velocity, and acceleration by crafting their own parachutes. They can use different bag materials to test for a smooth fall and graceful landing.

• Learn more: build a parachute

44) Solar-powered oven

Teach your students about thermal energy, reflection, and convection through this fun project. Test the oven on a warm sunny day for delicious results (s’mores).

• Learn more: build a solar oven

45) Swing a glass of water

  This is a great way for 7th graders to learn about centripetal force. The goal is to swing glasses of water over their heads without spilling the water (we recommend doing this experiment outside since it has the potential to get messy).

• Learn more: centripetal force experiment

46) Instant ice

  Through this experiment, your students can experiment with instant ice. For variations, try leaving the water in the freezer for different times, or using other liquids.

• Learn more: instant ice experiment

47) Rainbow density tower

  Teach about density using this simple project with a beautiful outcome. Once students have created their density towers, they can test the density of other objects ty tossing them in (how far will a coin sink? A peanut? An egg?)

• Learn more: density tower

48) Separate hot and cold water

  For another density-related experiment, try separating water by temperature. Students can run the test with the hotter (less density) on the bottom and colder (more density) on the top, and then vice versa.

• Learn more: separating hot and cold water

49) Physics of sound

  It turns out that sound has physical matter. Students can demonstrate this by blowing out a candle using only sound vibrations, which move through an oatmeal box.

• Learn more: discovering sound matters

50) Graphite circuit

  For another electricity-focused experiment, challenge your students to create an electrical circuit using pencil graphite. Since it involves drawing, students can put their art skills to use for a beautiful result.

• Learn more: graphite circuit

Engineering Projects – Science Fair Ideas for 7th Grade

51) pet auto-feeder.

  For a more advanced project with practical application, have your students build this automatic pet feeder. Some coding is involved, which could interest your computer-engineering-oriented students.

• Learn more: auto-feed your pet from anywhere

52) Balloon-powered car

  To help your students learn about engineering design and kinetic energy, suggest that they build a balloon car out of materials likely found around their homes. They can experiment with different wheel and balloon sizes to see how fast the car can go.

• Learn more: Newton’s balloon car

53) Build a geodesic dome

A geodesic dome is a thin-shell structure created out of triangular elements, which help it to withstand heavy loads. This experiment utilizes geometry concepts and it only requires paper and masking tape (students can play with different types of paper and tape as variables).

• Learn more: geodesic dome

54) Da Vinci’s bridge

  This bridge-building project is inspired by Leonardo da Vinci’s self-supporting wooden bridge. Your students will only need pencils and rubber bands (not to tie the pencils together, but to make sure they don’t slip). Test the bridge with different objects to see how much weight it can take.

• Learn more: Da Vinci’s bridge

55) Tensegrity structure

  Understand the mechanics of tension by making this functional floating structure that’s mind-boggling to look at. You will need string, popsicle sticks, and some patience for exact measurements.

• Learn more: anti-gravity structure

56) Make a water clock

  In this engineering project (which has been around since ancient times), students can create a clock from plastic cups, a small bell, yarn, and several other common craft items.

• Learn more:   water clock

57) Design a pinball machine

  Your 7th grade students can create functioning parts for a homemade pinball machine using objects found at home or in the classroom. They can test for speed and materials as they craft their own game.

• Learn more: homemade pinball

58) Rubber band helicopter

Students can learn about helicopter mechanics by constructing this flying and rubber-band-powered toy.

• Learn more: rubber band helicopter

59) Crash cars

This experiment involves building cars and then crash-testing them with raw eggs inside as “passengers.” What structures best protect the egg? Beware: this one could get messy.

• Learn more: car crash project

60) Build an electricity generator

  For another electrical engineering project, students can create an electric generator. Challenge them to test the generator using different materials for different results.

• Learn more: energy generator

Final thoughts – Science Fair Ideas for 7th Grade

Hopefully your 7 th grade students will find projects to get excited about from this list. For more classroom resources applicable to middle school students, we recommend the following articles:

• 124 Good Icebreaker Questions for Students/Adults
• 141 Fun, Weird, & Interesting Facts
• 102 Fun Last Day of School Activities
• 56 8 th Grade Science Fair Projects
• 100 Best Quotes About Education & Teachers
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30 Ideas For 7th Grade Science Fair Projects

By Beth Roberts | Last Updated May 4, 2022

We’ve compiled some of the best seventh grade science fair projects for your convenience! These science fair project ideas for 7th graders are sure to get you inspired and ready to do go on your own amazing research. We’ve also provided a list of resources you can use at home or in the classroom that will help give you tips on how to start your project, how to present it, and how to write an awesome science fair paper.

1. Drive A Balloon-Powered Car

This is an easy to build science fair project that you can even do with your younger brothers and sisters. You will need a high-quality balloon, scissors, tape, paperclip and a ruler.

First you will want to cut off the end of the balloon just above where half of it already has a hole in it. Then thread the tape through the hole so that it is on one side and stick the paperclip through it (close to the bottom of the balloon). Now take your ruler and measure how long it is going to be. When measuring however, you have to make sure that you are going to cut past where half of your paperclip is.

2. Make A Bionic Hand

This project involves making a bionic hand out of rubber and plastic parts and will involve cutting, gluing and soldering. You will want to be careful when cutting this project as you can seriously injure yourself if you cut too close to the plastic so make a good outline before doing it. First you will want to find out how big your hand is going to be. Then draw that on the rubber sheet with a pencil (minus the thumb where it will be). Measure how long your hand is going to be from top to bottom then measure 1/4″ from all 4 sides (you want 4 measurements).

3. Do An Experiment On The Physical Properties Of Water

This seventh grade science fair project assumes you already know some things about the physical properties of water. You will want to do this experiment with a partner who also knows some things about water. First you will want to find out whether or not your partner is willing to do this experiment with you and then measure out how many 1/2 cups of water there are in a gallon. Then take a sample of that and measure it again, this time in 1/4 cups. Then you will want to find out how many 4 oz cups are in your sample, then 1 cup and then 2 cups. Now take your results and do what is called an average of those measurements in a data table like this.

4. Make A Tornado In A Bottle

This project is somewhat easy but it may take some time to get right . You will want to do this by yourself as you can be seriously injured if you do the wrong thing. First you will want to take your empty soda bottle and rinse out all of the soda from it. Then make sure there is no water left in the bottle from rinsing it then soak it in water for about 20 minutes. After your 20 minutes are up, shake the water out of the bottle, but make sure you leave enough that it will not leak out as soon as you put in your dry ice (if you use dry ice).

5. Sorting Jellybeans is a Fun way To Learn about Heredity.

Use the following pointers to sort jellybeans :

a. Jellybeans come in blue, yellow, orange and pink jellybean colors (you can use colored paper and a different color of pen)

b. Jellybeans are round (you can use a ruler)

c. The outside edge of each jellybean is the “seam” that runs down the middle of the jellybean (you will be able to see this clearly after you fill the bag) 

6. Allow A Teabag To Float In The Air

This experiment is best done outside. First you will want to take a tea bag and put it in a glass of water , then carefully place it on top of the water in the cup. Make sure there is plenty of room between the cup and the tea bag (this will allow for air to circulate and help it to float). Watch as your teabag floats in mid-air!

7. Make A Slime Bomb

This science fair project is best done with an adult or older kid . You will want to find out what chemicals to use for the slime (you can search the internet for that) and then make it. It is best if you have a friend who knows how to make slime with you, too!

8. Build A Mini Catapult And Launch Yourself Across The Room

This science fair project can be fun , but it does take some time to get right. You will need several objects to build a mini catapult out of: a small stick, tape, string, paperclips and cans (for launching).

9. Make A Vacuum Cleaner Powered Fan

This science fair project is fun , but it can be dangerous. You will want to do this in an area where you do not have many dangerous electrical cords nearby and make sure you can easily get out of the way if it starts to fly off the ground. You will need a fan, a handheld vacuum, scissors and paperclips. First you will want to take apart your handheld vacuum and find the blade part of it. You will want to cut out about 1/2″ of the rubber around the blade. Then tape that on one side of your fan (make sure you have 2 blades facing each other).

10. Make A Solar Oven Design.

Students explore thermal energy, reflection, convection, and other physics principles as they experiment with the best way to create a solar oven . They’ll be able to serve up their experiment findings as well as their final reports!

11. Make A Rocket Powered By Dry Ice.

This is a science fair project that is best accompanied with someone who has done this before. You will want to make sure you are in an open area where you can easily get out of the way if it does not work.

First you will want to use a craft knife to cut out the bottom part of a soda bottle, making sure that you leave about 1/4″ on the bottom so it does not leak. About halfway up you will want to then cut off another part (this will be used for your air intake) and make sure your intake side is smaller than your exhaust side. Cut as close as possible so that they are seamless together.

12. Make Your Own Lava Lamp

This is a fun science fair project that involves melting wax and oil together . You will want to make sure you have something to put this in (a bottle, jar or plastic cup would work). You will need: red food coloring, water, dish detergent, oil (olive or vegetable), and that small globe from a lava lamp you might have lying around the house.

13. Take A Look At How The Greenhouse Effect Works.

The greenhouse effect is a natural phenomenon that can be observed in the Earth’s atmosphere on a daily basis. Many people are unaware of how it works and how much it affects our lives. This project encourages students to gain a better understanding of the greenhouse effect and its impact on Earth’s temperature.

14. Use Water Color To Make Your Own Kaleidoscope

You can use a permanent marker, paint or crayon. By varying the size and shape of the dots, you can create many different patterns in your result. Study how light is reflected in two and three dimensions of the pattern.

15. A Dense Rainbow Is Awe-Inspiring.

Density is the same as mass divided by volume . It is a measure of how tightly packed together molecules of matter are. This project forces students to learn about density in order to obtain a rainbow of monochromatic liquids in graduated cylinders that vary in size. The light source and liquid arrangement allows them to observe the density spectrum of each liquid.

16. Use Charcoal To Purify Water.

Water is one of the most important substances on Earth . It keeps us alive, purifies us and is also used to grow crops. Many people do not have access to clean drinking water and this project will help them by guiding them in the creation and use of charcoal for use in a filter for water purification.

17. Find Out How Energy Is Transformed.

Energy can be transformed from one form to another , but often loses some of its original properties. This project highlights the effects on a car battery if it is connected to a series of light bulbs and a conducting wire.

18. Make Your Own Tesla Coil.

Invented by Nikola Tesla in 1891, the Tesla Coil is an electrical resonant transformer circuit capable of producing extremely high voltages using an air-core transformer based on two spark gaps and two capacitors that allow alternating current through the primary coil to build up an oscillating high voltage in the secondary coil without requiring any type of power source with wires directly attached to it like you would find in conventional coils.

19. Coat Some Coins With Copper.

Copper-plating gives a metallic luster and color to many things , such as coins, jewelry, and even small kitchen utensils. In this project, students will use copper sulphate solution to convert a penny into a shiny plated coin.

20. Play With Hydraulics To See What You Can Come Up With.

Hydraulics is the study of fluids at rest or in motion and the mechanical devices that are directed by them. This project will allow students to learn about how pressure and force can be used to create movement and power.

21. Biofilms Should Be Collected And Managed.

Biofilms are naturally occurring communities of microorganisms , usually bacteria but also fungi and algae cells. Biofilms are found in almost all natural environments and on most man-made surfaces. They consist of living microbes that can persist for long periods, while producing tranquil points which may be as much as 100 times greater than their own area. This project introduces students to biofilms in order to encourage them to observe how they grow and how they are treated during the experiments.

22. Using Experiment Kits On Baking Soda And Vinegar, Make A Volcano.

An erupting volcano is an impressive sight to many people , but they are also extremely dangerous! In this experiment, students will learn about what causes volcanoes to erupt and what type of rocks are needed to build them with their own hands.

23. Crystals Are Fun To Grow And Play With.

Crystals are beautiful, fascinating and useful . Students will learn about how crystals grow by experiencing it themselves and observing the different ways they can form, with the help of a variety of experiment kits. This is a hands-on science experiment that encourages students to be creative, experience sensory impact and develop an intuitive understanding of materials as they work with them in real time.

24. Explore The Laws Of Motion Using A Spinner.

Gyroscopes are used in many aspects of our everyday lives . You know them as small spinning wheels that come with every electronic device nowadays, but their uses extend from guiding missiles and rockets in flight, to balancing boats and planes, to keeping your computer monitor from falling over on its side.

25. Make A Simple Breadboard To Use A Battery And Then Attach LEDs.

A breadboard is a board which allows you to connect multiple electronic components on one side . This project uses simple components to demonstrate the use of electricity in real time. You will need some type of battery and some LEDs, but you can buy these items at a local hardware store in addition to assembling the parts yourself.

26. Make A Simple Musical Instrument Using Simple Items.

A musical instrument is any object that is used to make music . In this project, students will use an empty plastic water bottle and some chopsticks to make a simple musical instrument; they will explore the laws of vibration by experimenting with a variety of sounds.

27. Make A Paper Airplane Which Can Fly.

A paper airplane is an aircraft designed to fly by being thrown . There are many variations of paper airplanes, but they all rely on the same basic structure and usually only require a piece of paper or thin cardboard. In this project, students will learn about aerodynamics as they build their own paper airplane.

28. Build A Storage Bin Using Recycled Materials

Storage bins are used to store clothing or other things that you do not need to use regularly but still want to keep around. This project will help students learn about the different shapes of storage bins and the ability they have to store things while being used in real time.

29. Make A Simple Compass.

A compass is a tool used to measure direction and orientation . It is used for navigation and orienteering. This project will help students explore the earth’s magnetic field using simple materials to create their own homemade compass.

30. Make A Rock Tumbler And Use It To Polish Rocks.

Polishing can be a valuable skill that provides aesthetic value and shiny, smooth surfaces for your household items. In this experiment, students will explore various sources for polishing rocks, as well as using their own creativity to create dazzling results in real-time during the experiment itself.

The field of science is vast and varied, with many different types of projects that students can engage in to learn about the world around them. Science projects can be engaging for students and teachers alike if they are designed to provoke a level of interest and excitement about what students are learning. It is also important to consider that science is not only limited to the four corners of a book or classroom; it is all around us, literally everywhere!

This means that there may be opportunities for children to learn while they are waiting in line at the bank, watching television at home, or even while they are otherwise being entertained.

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Science Projects > Science Fair Projects for 7th Graders  

Science Fair Projects for 7th Graders

Science fair projects for 7th graders​​.

Science fair projects for 7th graders are a step up in complexity. Because 7th graders have a better grasp of science concepts, they’re expected to practice the scientific method in the way they approach their experiments–which includes starting with a hypothesis and then conducting processes to prove or disprove it. 

Of course, just because these science fair projects are a bit more challenging doesn’t mean that they can’t still be fun! Home Science Tools’ science kits are designed to help kids learn important science lessons through easy-to-do and enjoyable experiments. Here are some easy science fair projects for kids to explore:

Potato Battery

There are many different types of batteries, but all of them generate electricity in the same way–through a chemical reaction. This chemical reaction typically happens between two pieces of metal (electrodes) and a liquid or paste (electrolyte). Potatoes contain a lot of moisture, and this moisture works very well as an electrolyte. This means that when you add some metal electrodes to the root crop, you can create a potato battery!

Creating a potato battery will require some tools you won’t typically have in the house, such as electrodes and a multimeter. Home Science Tools’ Veggie Power Battery Kit for Science Buddies gives you everything you need to make this science fair project work! Once you have your battery, you can have fun with some science project name suggestions for the spud.

Rainbow Fire

With Home Science Tools’ Rainbow Fire Kit for Science Buddies, your child can find out how different chemical compounds react with fire and how these reactions emit different colors. Besides the lesson on chemical reactions, this kit also touches on some astronomy. Astronomers actually determine the atomic composition of different stars by measuring the spectrum of light they emit!

Bacteria Colonies

Bacteria grow all around us, and it’s fun to find out just how much of it exists in everyday items. With Home Science Tools’ Bacteria Growing Kit for Science Buddies, your student can culture their own microbe colony from bacteria swabbed from everyday household items. 

They can explore bacteria on their hands, from their phones, or on the kitchen counter, and learn how to isolate and grow bacteria colonies. Some science fair project ideas include comparing which household surface contains the most germs or checking if a pet’s mouth is dirtier than its owner’s!

Crystal Radio

A crystal radio is the simplest type of radio receiver as it doesn’t need any external power; instead, it only uses sound waves to produce sound. Its name comes from its most important component, a crystal detector (called a ‘diode’), which is made from crystalline minerals (such as galena). 

Home Science Tools’ Build Your Own Crystal Radio Kit for Science Buddies allows you to make this popular form of receiver with all the necessary tools. It’s a great way to allow your 7th grader to present a science fair project on radio waves while learning the basic radio circuit elements required to receive radio signals.

Find Science Fair Project Kits on Home Science Tools

Home Science Tools is dedicated to making science fun and accessible with home science kits that are easy to do! You can explore different options, from easy experiments you can do at home to explorative activities that make for great science fair projects for 7th graders. Check out our catalog in time for your child’s next science fair presentation!

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7th Grade Science Fair Projects

Age-Appropriate Ideas That Are Fascinating and Fun!

Jon Feingersh Photography Inc / Getty Images

• Ph.D., Biomedical Sciences, University of Tennessee at Knoxville
• B.A., Physics and Mathematics, Hastings College

Seventh grade and middle school, in general, are a big time for science fairs because it's a wonderful educational level for students to come up with ideas to explore using the scientific method and ways to investigate their questions. Parents and teachers still provide direction, especially helping students devise manageable experiments and appropriate work technology to present their results. However, the actual experiment should be done by the 7th grader. The student should record data and analyze it to determine whether or not the hypothesis is supported. Here are some ideas appropriate for the 7th-grade level.

7th Grade Science Project Ideas and Questions

• Use a prism to show the spectrum of visible light on a sheet of paper. Mark the endpoints, which is how far into infrared and ultraviolet you can see. Compare your visual range with that of other family members or other students. Is there a difference in range between genders? Do family members have a similar range? See if you can draw any conclusions ​using the scientific method .
• Composting is a great way to reduce waste and recycle nutrients, yet some household products and foods are contaminated with heavy metals and organic chemicals. Devise a test to measure one of these chemicals and compare the concentration in compost versus that in the ordinary soil in your yard.
• Houseplants can absorb and detoxify indoor pollution. Do research to identify which houseplants are best at cleaning the air in a home, office, or classroom. Now, take the project to the next level and determine which plants are most practical, affordable, and useful. Make a chart of the chemicals the plants clean, whether the plants are toxic to children and pets, whether they can live in low-light conditions or require bright light or special care, how much the plants cost, and whether they are readily available.
• Which brand of ibuprofen (or the student could test another type of pain reliever) dissolves the most quickly?
• Does the pH of juice change over time?
• Insects can sense light and dark. Can they still see light if it's only red or blue, etc.?
• How well does a football helmet really protect against impact? You could use a skating helmet or any other protective gear, depending on what you have available.
• How does the concentration of chlorine in water affect the rate or percentage of seed germination?
• What is the effect of watering schedules on the germination (or growth rate) of seeds from a certain plant?
• How does the presence of a given medication in water affect the survivability of Daphnia?
• Does the presence of de-icer salt affect the movement behavior of earthworms?
• Does the bounciness of a golf ball relate to its ability to be hit long-distance?
• Does the species of wood affect the rate at which it burns? Its heat output?
• Does the mass of a baseball bat relate to the distance the baseball travels?
• Is the paper towel brand that absorbs the most water the same as the brand that absorbs the most oil?
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25 Awesome topic ideas for class 7 Science projects

• April 21, 2024

Class 7 Science Projects

1. swing a glass of water, 2. exploration of swim bladders , 3. blow hot or cold bubbles, 4. spin bey blades to explore angular momentum, 5. play around with oxidation, 6. generate electricity science , 7. create a taxonomy system, 8. build a da vinci bridge, 9. design a pinball machine , 10. learn whether color affects memory, 11. collect and control biofilm, 12. tinker around with hydraulic power , 13. swab and test for germs, 14. copper-plate some coins, 15. stretch your mind with a flexibility , 16. extract dna from an onion, 17. explore how sugary drinks affect teeth , 18. design your own slime, 19. construct a water clock , 20. ride the wave (machine), 21. purify water with charcoal , 22. test ph using cabbage, 23. burn calories to explore stored energy  , 24. discover computer coding with lego bricks  , 25. marvel at a density rainbow , final words.

If you’re looking for some great ideas for class science projects, you’ve come to the right place! In this article, we’ll give you some tips on how to choose a project that’s both interesting and educational.

We know that coming up with science project ideas can be tough, so we’ve compiled a list of some awesome ideas to get you started. Whether you’re interested in studying the stars or investigating the properties of matter, there’s a project here for you!

Remember, the best projects are those that are both fun and informative. So take your time in choosing a topic, and make sure to consult your teacher before getting started. With these guidelines in mind, you’re sure to create a masterpiece!

There are a number of really great ideas for class 7 science projects. These can be done with just a few laboratory items and a little bit of knowledge about how circuits work. These are the fun project that can be done over the course of a few weeks. 

A glass of water is a great way to get started with your science project. Not only is it an easy and inexpensive way to get started, but you can also use it to learn about the properties of water and how they change when different substances are added to it.

You can also use it to study the effects of temperature on water and how different liquids mix together.

When it comes to exploring the science behind swim bladders, there are a few key things to keep in mind.

First, swim bladders are gas-filled sacs that help fish maintain their buoyancy.

Second, the size and shape of a fish’s swim bladder can vary depending on the species.

And lastly, there is some evidence to suggest that fish with swim bladders may be able to sense changes in water pressure and temperature.

Bubbles are always a hit with kids, so why not incorporate them into a science project?

There are two ways to blow bubbles – with hot air or cold air. Try both methods and see which one produces bigger bubbles.

You can also experiment with different types of soap to see which one makes the strongest bubbles.

If you’re looking for a fun and engaging way to learn about angular momentum, then look no further than Beyblade spinning toys. By spinning a Beyblade around its axis, students can observe firsthand how angular momentum affects an object in motion.

You can also experiment with different blade shapes and sizes to see how they affect the toy’s spin.

There are many different types of oxidation that can be explored through class 7 science projects. One example is rust, which is the oxidation of iron. 

This can be explored by testing different methods of preventing rust, such as painting or coating iron in a protective layer.

Other types of oxidation include the fading of colors and the decomposition of materials. These processes can be accelerated and monitored through experiments.

Generating electricity is a process of converting one form of energy into another. In this science experiment, we will be using our bodies to generate electricity.

First, we will take one of the alligator clip wires and attach it to the positive side of the battery.

 Then, we will take the other alligator clip wire and attach it to the negative side of the battery. Finally, we will touch the two wires together, which will cause the light bulb to light up!

This experiment is a great way to learn about how electricity is generated and used in our everyday lives.

When creating a taxonomy system for a class 7 science project, it is important to consider what information will be most useful for the project.

For example, if the focus of the project is on plants, then including information on kingdom and phylum would be most helpful. 

If the focus of the project is on animals, then including information on class and order would be most helpful.

Once you have decided what information will be most useful for the project, you can begin creating your taxonomy system.

In this project, students will learn about the engineering principles used by Leonardo da Vinci to design his famous bridge. They will then use these same principles to build their own bridges out of popsicle sticks and glue.

This is a great project for teaching the basics of engineering and physics .  

Students will use popsicle sticks and glue to build a replica of the famous da Vinci bridge.

This project is perfect for students who are interested in engineering and architecture. In addition to being a fun and engaging class 7 science project, this experiment will also teach students about the science of bridges. 

A pinball machine is a great way to teach the scientific method to kids. With this experiment, they will learn how to design and build a simple pinball machine. They will also learn about the physics of motion and energy. 

First, cut a hole in the cardboard. This will be the starting point for your ball. Next, tape three paper cups upside down on the cardboard. These will be your targets. Finally, cut a small slit in the bottom of each cup. The ball will fall through these slits when hit.

Now it’s time to test your machine! Drop the ball from the top of the cardboard and see how it does. Does it hit all the targets? Does it go off the edge of the cardboard? Make adjustments until you are happy with your design.

Color has been shown to affect memory in a variety of ways.

For instance, one study found that participants were better able to remember words that were presented in red font if the words had a positive connotation (e.g., love, happy), but they were better able to remember words that were presented in blue font if the words had a negative connotation (e.g., sad, evil).

These findings suggest that color can influence memory by affecting how we process and encode information.

Therefore, if you’re working on a class 7 science project about memory, you may want to experiment with different colors to see how they impact memory recall.

To collect and control biofilm, students will need to understand what it is and how it forms. A biofilm is a slimy substance that contains bacteria, fungi, and other microorganisms. It can form on wet surfaces, such as in pipes or on teeth.

To control biofilm, students will need to learn about the different methods of cleaning and disinfecting surfaces.

They will also have to understand how biofilm can be used to benefit humans, such as in the production of certain medications or in the treatment of sewage.

 If you’re looking for some ideas for your next class 7 science projects, why not try a hydraulic power experiment?

Hydraulic power is the force that is generated when water is under pressure. By using this force, we can do things like lift heavy objects or move vehicles. In this experiment, you will be using hydraulic power to move a small object.

Fill your container with water and add a few drops of food coloring if you like. Place your object in the center of the container.

Make sure that the top of the object is level with the water line.

Now, apply pressure to one side of the container with your hand. You should see the object start to move!

Try different amounts of pressure to see how it affects the speed of movement. Can you make the object move faster or slower? 

There are many ways to test for the presence of germs, but one of the most common is to swab an area and then test the swab for bacteria or other microorganisms. This can be done using a variety of methods, including microscopy, culture plates, and DNA sequencing.

Copper-plating coins is a great way to add a personal touch to your pocket change. This project is perfect for kids who are interested in science and chemistry.

First, clean your coins with the distilled water and dry them off. Next, cut the copper into small strips using scissors or wire cutters.

Attach one end of the copper strips to the positive terminal of the battery with an alligator clip.

Then, touch the other end of the copper strip to the negative terminal of the battery. Finally, dip your coins into the solution and wait a few minutes for them to turn green.

Too often, we get bogged down in the same old routines and fail to see the beauty and excitement that surrounds us everyday.

One way to combat this rut is to challenge your brain with new experiences. A great way to do this is through flexibility experiments.

Flexibility experiments are a fun way to explore the world around you while also growing your mental capacity. By their very nature, they force you to think outside the box and come up with new ways to approach problems. This makes them perfect for science class projects.

There are endless possibilities when it comes to flexibility experiments. You could try something as simple as seeing how long you can hold a handstand or how far you can stretch without moving your feet.

Or, you could get really creative and build a Rube Goldberg machine that accomplishes a simple task in the most complicated way possible.

No matter what you choose to do, flexing your mental muscle with a flexibility experiment is sure to be a fun and enlightening experience!

There are many ways to extract DNA from an onion, but we will outline two of the most popular methods.

The first method is to cut the onion in half and then use a blender or other tool to blend it up into a liquid.

Once the onion is liquified, add some dish soap and stir. The dish soap will break down the cell walls of the onion and release the DNA. 

Then, pour the mixture into a strainer to remove any solids. Finally, add some isopropyl alcohol to the liquid and gently swirl.

The DNA will precipitate out of solution and collect at the bottom of the container. You can then scoop it out with a spoon or pipette.

Sugary drinks are often high in acidity, which can lead to tooth enamel erosion.

In this experiment, students will investigate how sugary drinks affect teeth by placing eggshells in different types of sugary drinks and observing the changes over time.

Collect a few eggshells and clean them thoroughly. Allow them to dry completely. Fill three glasses with water and label them “control”. Add one eggshell to each glass.

Fill three other glasses with different sugary drinks and label them accordingly. Add one eggshell to each glass.

Observe the eggshells in the control group after 24 hours, 48 hours, and 72 hours. Record your observations in a table or chart.

Repeat step 4 for the eggshells in the sugary drink group. Compare your results between the two groups of eggshells!

There are a ton of ways to make slime, but here is one way to design your own slime:

In a bowl, mix together the glue and water. Add food coloring, glitter, and any other desired add-ins to the bowl and mix together.

In a separate bowl, mix together 1/2 tsp borax powder with 1/4 cup water. Stir until the borax is dissolved. Pour the borax mixture into the glue mixture and stir until combined. The slime will start to form immediately.

Once everything is mixed together, knead the slime with your hands until it reaches the desired consistency. If it’s too sticky, add a bit more borax powder; if it’s too stiff, add a bit more water. And that’s it – you’ve made your very own slime!

Cut a small hole in the bottom of your container. The hole should be big enough to fit the end of your ruler or measuring tape. Fill your container with water. You can add food coloring to the water if you like. 

Place the container on a flat surface and insert the ruler or measuring tape through the hole in the bottom. The end of the ruler or measuring tape should be touching the bottom of the container.

Use the permanent marker to mark where the water level is on the outside of the container. This will be your starting point. Wait 1 hour and then use the permanent marker to mark where the water level is again. This will be your ending point.

Measure the distance between your starting point and ending point. This is how much water has flowed out of your container in 1 hour!

If you’re looking for an awesome science project, why not try riding the wave machine? This is a great project for anyone interested in physics or engineering, and it’s sure to be a hit with your classmates. Here’s what you’ll need to do to get started:

Build your own wave machine. You can find plenty of instructions online or in science textbooks. Experiment with different materials to see what works best. Some good options include cardboard, wood, foam, and plastic.

Once you have your machine built, test it out! See how high you can make the waves and how long they last. Make observations and take measurements throughout your experiment. Be sure to record all of your data so that you can analyze it later.

Present your findings in a detailed report or presentation. Include information on your design, testing process, results, and conclusions.

When it comes to Science projects, there are many different ways to purify water. One popular method is using charcoal. This experiment will show you how effective charcoal is at purifying water.

Pour the cup of water into the bowl. Add the activated charcoal to the water and stir. Place the coffee filter or cloth over the top of the bowl and allow the mixture to sit for 15 minutes.

After 15 minutes, remove the coffee filter or cloth and observe the filtered water. You should notice that it is much clearer than when you started!

First, you’ll need to gather your materials. You’ll need a head of cabbage, red wine vinegar, water, a glass jar or container, a measuring spoon, and pH strips. You’ll also need blue food coloring if you want to see the pH change color as it happens.

To start, cut the cabbage into small pieces and add it to the jar or container. Add equal parts red wine vinegar and water to the cabbage (1/2 cup each should be enough). If you’re using food coloring, add a few drops of blue food coloring to the mixture now.

Place the lid on the jar or container and give it a good shake until everything is mixed together well. Let the mixture sit for at least 24 hours so that the cabbage has time to release its natural pH indicator – this is what will show you how acidic or basic your solution is on the pH scale.

After 24 hours have passed, it’s time to test your solution! Take a pH strip and dip it into the liquid in the jar or container. Compare the color of the strip to the chart that came with your pH strips – this will tell you where your solution falls on the pH scale (acidic, neutral, or basic).

To measure the amount of energy that is stored in various types of food, we will need to conduct an experiment. In this experiment, we will be burning calories to see how much energy is released.

Place the food item on the balance scale and weigh it. Record the weight in your data table. Place the food item on a heat-proof surface. Ignite it with a match and start the stopwatch or timer. Record the time in your data table. 

Allow the food item to burn completely. Once it has burned out, weigh the ashes on the balance scale and record the weight in your data table. Calculate the amount of energy released by the food by subtracting the weight of the ashes from the original weight of the food item.

This will give you grams of lost weight due to combustion. Energy release is measured in kilojoules/kilocalories (kJ/kcal), so use your calculator to convert grams lost to kJ/kcal lost using this formula: kJ/kcal = 4184 x grams lost

Coding with LEGO bricks is a great way to introduce kids to the basics of computer programming. By following simple instructions, they can create programs that make their LEGO creations move and interact with each other. This is a great way to get kids interested in coding, and it’s also a lot of fun! 

Coding with LEGO is a great way for kids to learn the basics of coding. By experimenting with different code blocks, they can learn how to create simple programs and games . Plus, it’s a lot of fun!

 A density rainbow is a beautiful and easy way to learn about density ! All you need is a clear container, some water, food coloring, and a few common household objects.

To make your density rainbow, start by filling the container with water. Add a few drops of food coloring to the water, and then carefully add your objects one at a time. Be sure to add them in order from heaviest to lightest!

Once all of your objects are in the water, take a step back and admire your handiwork. The different colors of the food coloring will show you which object is denser than the others. The heaviest object will be at the bottom of the container, while the lightest object will float on top!

It’s finally time to wrap up this awesome blog post on ideas for class science projects! We hope you found some inspiration from our list and that your students have a blast with their chosen project. As always, be sure to consult your child’s teacher before starting any project to make sure it falls within the guidelines.

And there you have it! Our top ideas for class science projects. Did we miss any? Kindly let us know in the comments below.

We hope that this list of 25 awesome topic ideas for class 7 Science projects has given you some inspiration for your own project. Remember to choose a topic that interests you and that you can research thoroughly. Good luck!

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7th Grade Science Fair Projects: Experiments, Model Building, Research, And More

February 18, 2024 //  by  Suzanne Bucknam

From homemade helping hands to germs and sugary drinks, we have all of the most creative ideas for science projects right here! Time to use the scientific method for some awesome experiments and impress your peers. Let us help you win your middle school science fair!

1. Caffeine and Computers

Can caffeine really help us focus more and work harder or faster? Write down some questions you want to answer and get experimenting with a cup of coffee (or two) and a computer! You can also use soda or another beverage with high caffeine content.

Learn More: ThoughtCo.

2. Bridging the Gaps

Grab some pencils and small rubber bands to build a bridge inspired by Leonardo da Vinci! Follow the instructions here and see how much weight your bridge can hold at the end. You can make it more challenging by setting a time restriction or making it into a race!

Learn More: Pinterest

3. Generating Amazement

This science fair project idea is sure to win you some blue ribbons! See what materials you need here and get started constructing your generator.

Learn More: Sciencing

4. Blowing Bubbles

Does air temperature affect whether or not bubbles can form? Answer this question and others with this fun and interactive bubble-blowing science experiment using hot and cold water and see what happens!

5. Homemade Chapstick

This science activity only requires a few natural materials that your kids can mix and match to create a completely unique lip balm. With just a few easy steps, they’ll use ingredients such as beeswax, shea butter, and almond oil to whip up this useful project that they can then share with their friends and family.

Learn More: Ecoliving Mama

6. Bacteria Buddies

Collect and measure biofilm for your 7th grade science fair project. Pick a small container or surface you want to observe, submerge it in water for 2 weeks, and see what cool bacterial growth happens. Check out the link here to get started!

Learn More: The Homeschool Scientist

7. High Voice Helium

Here is some balloon science that is sure to bring laughs to the science fair. Why does helium affect our voice? Find out the answer for yourself by attempting this fun experiment!

Learn More: Physlink

8. LEGO Coding

Do your students have an interest in computers? Grab some LEGO bricks and learn the basics of coding with this fun and useful engineering science fair project .

Learn More: Little Bins For Little Hands

9. A Rainbow of Density

This colorful experiment looks almost pretty enough to drink! Measure the density of various liquids by pouring them into a see-through container and seeing how they settle in perfect layers.

10. Helping Hands

With a few materials, you can make your own working robotic hand! See what you need to begin here, and start using your extra hand to pick up some toys or have a glass of water.

Learn More: Science Buddies

11. Can Crusher

Did you know you can crush cans with air? Well, air pressure. It’s a matter of hot and cold water causing pressure build-up in the can. Follow the instructions here to see if you can snap, crackle, and pop!

Learn More: Steve Spangler Science

12. Cooking with The Sun

Are you hungry? Now you can roast your marshmallows using an old pizza box, aluminum foil, and a few other household items. See how to put your over together here and let the sun do the rest!

Learn More: ChildSci

13. Caviar or Juice Balls?

Your classmates don’t want to drink their soda or juice? Turn it into fun and delicious juice spheres using this amazing 7th-grade science project. See what you’ll need to transform your liquids here, and get mixing!

14. Acid Rain

See all the types of corrosion and how they are affected by pH levels using this fun 8th grade science project. You can choose any acidic liquid and measure the changes you see over time. Find instructions here and get experimenting!

15. It’s Dome Time!

Use newspaper, tape, and your amazing brain to create a geodesic dome that can support a surprising amount of weight. This is a simple age-appropriate idea for 5th graders but can be modified with more challenging designs for your 7th or 8th grader.

16. Climate Change in Action!

Teach your middle school students about greenhouse gases and the wonders of our atmosphere with this fun science experiment. You’ll need some glass jars, cold water, and a thermometer. Follow the instructions here to see how the sun can heat up the water and release the gas inside the jars!

Learn More: Education.com

17. The Power of Charcoal

This magical powder is used in a variety of liquid water purification systems and you can see it in action with this easy science experiment. Follow the simple instructions here to watch how activated charcoal absorbs and removes molecules from your water!

18. Bath Bomb Science

Bath bombs are great for a relaxing soak, but did you ever wonder if water temperature affects their bubbles? Grab some jars, a thermometer, and some of these fizzy bombs to test and see the results on your bath bomb science log. Find detailed instructions on how to, here!

Learn more: Steam Powered Family

19. Mummy Apples?!

Did you know that with a few basic household ingredients you can mummify your food? This experiment uses apple slices, but you can try this in class or at home with a variety of foods. See how to make these salty mummies here!

Learn More: Raising Arizona Kids

20. It’s A Germy World Out There!

Pick a room at home, or your classroom and start swabbing! Using cotton swabs, take samples from multiple surfaces and let them sit in agar and grow. Take pictures and notes on how the germs grow in a week or two. To see what you need, check out this link.

Learn More: Angelic Scalliwags Homeschool

21. Insect Behavior Experiment

There are lots of simple and observable animal behavior experiments to try. This one sees how temperature affects ant behavior. You can put a container of ants in the fridge and another in the sun and watch/record their movements.

Learn More: Ants Alive

22. Color Associations

Try this experiment out on your classmates to see how colors affect how we learn, react, and retain information. You’ll need some index cards and markers. See how to execute this experiment in a class by following the instructions in this link.

23. Pinball Fun

Pinball machines may seem complicated, but with some creativity and a few art supplies, you can make your own to show off at the science fair. See the engineering design process to build your own here.

Learn More: Science Museum Group

24.  Classifying Candy

Classification is a way to find similarities and differences within a group. With this fun experiment, your students will classify different candies to represent taxonomy and understand a little more about group formation.

Learn More: Our Journey Westward

25. Amazing Oxidation!

Grab some household items, put them in paper cups of water, and see if they rust. Watch as they react differently depending on the type of water (distilled water versus saltwater) and take notes on your findings. For more information, check out this helpful link!

Learn More: Teach Beside Me

26. Melting Ice Mixtures

See if adding sugar, salt, or other substances changes the melting speed of ice cubes with this fun and easy experiment. Follow the steps here and log your results!

27. Air-Powered Car

Can a balloon propel a car? Test this hypothesis yourself (in a mini version) using a simple homemade cardboard car and a balloon. Make a list of questions you wish to test and see if this is the future of travel!

28. Preservative Spices

This spicy experiment will have your brain and tastes buds tingling! See what spices contain the preservative ingredient “carvacrol” and how they react with dissolved chicken broth cubes by following the procedure instructions here.

29. Testing How Medications Dissolve

There are many brands of Ibuprofen out there. Pick up a few and test how well and fast they dissolve to see their effectiveness at relieving pain. Most medications need to pass into your bloodstream to work so this can give you useful real-life information. For tips and information check out this useful link.

30. Water Erosion

This experiment is a fun way to see how water and earthwork together to create incredible natural landscapes. Pour some water into sand and see how the sand moves around and forms trenches. Log your results and repeat using different methods and strategies.

31. Tee Off!

Do you like golf? Are you curious about how height affects your swing and accuracy? Try this fun experiment by getting some volunteer golfers, male and female, and 3 different tees of varying heights. See if the longer tee helps or hinders the velocity of your ball and record your results.

Learn More: Poster 4 Teachers

32. Are All Sugars the Same?

Test to see how sugar from different sources is processed by the body. Use water, honey, juice, and table sugar to test the reactions with reagent tablets. The results might give you a sugar rush!

33. Manicure Time

Grab a few different types and brands of nail polish from your local beauty store and test them out to see which last the longest. You can put a different polish on each fingernail and see how many days they take to chip or fade. Record your results.

Learn More: Supply Me

34. Germs Around Us

Test to see which surfaces have the most germs on them. Get a bacteria growing kit and pick some places to swab. You might be surprised by the germy results!

35. Portable Solar Energy

Build your own solar battery to charge your smart devices on the go. Follow the instructions here to put together your solar battery pack and see how well it works at powering your phone.

Learn More: Instructables

36. Remembering Different Fonts 

Does using one font help us remember the content better than if we were to use another one? If our teachers use Times New Roman versus Serif will we be able to remember information more easily? Grab a computer and some volunteers and try it out yourself!

Learn More: Science Fair Adventure

37. Keep it Hot!

Do you wish your hot coffee, tea, or soup never got cold? Is there a way we can keep things hot? Try out this experiment using different cups and materials to see which ones keep the heat in the longest.

38. Musical Study Session

Should classrooms have music playing in the background to help students concentrate? How do different people react to music and do different types of music affect individuals in alternative ways? Try this out with a volunteer classroom and a playlist of various genres.

39. Flowers in Time

Are there simple things we can add to our water to help our flowers bloom for longer? Does water temperature matter? What if we add sugar or salt? Test out your ideas and hypotheses with this experiment.

40. Pen or Pencil?

Test your hand movement/fatigue and note-taking ability with different writing instruments to see which works the best. Grab a few options: big pencil, mini pencil, blue pen, gel pen, marker, colored pencil. Use your classmates as test subjects and see what they think!

41. Dominant Senses

Can we feel more sensations in the dominant side of our bodies? You can try this out with 2 bowls, some hot and cold water, and a stopwatch/timer. See if you and your friends can last longer in the different temperatures with your non-dominant or dominant hands.

42. Light Up the Dark

Black lights are a super fun tool to use in any experiment with fluorescents. See what materials, liquids, chemicals, and natural resources glow under a black light and which do not. Gives reasons to explain your findings and if your predictions were proven correct or incorrect.

43. Green Thumb or Bubble Gum?

How can we make hybrid fruits and vegetables like baby kiwi and blood limes? Scientists and botanists have been experimenting with grafting for centuries, and so can you! Use some chewing gum as a way to hold the stem and cuttings together so they can grow into one new hybrid branch, and see how your new invention grows!

Learn More: 100 Amazing Science Fair Projects by Glen Vecchione

44. Vision and Eye Color

Do blue-eyed people see better than brown-eyed people? More specifically this experiment looks at peripheral vision in different eye colors. Grab some classmates with different eye colors and some objects you can place around their area of vision to see who can see the best and if there is a correlation with eye color.

45. Pop Pop POP!

See which popcorn brand pops the most kernels per bag. Grab a few bags of different popcorn and test this out with the same time and microwave to see which gives you the most pop for your buck!

46. Insulation Investigation

Get your kiddies to explore how well different materials insulate against the cold with this simple science fair project. They can use a variety of materials to insulate some hot water, then observe and record the temperature changes that occur over time with a thermometer. 

Learn More: Family Education

47. Earthquake Simulator

Shake things up at your science fair by having your learners develop an earthquake simulator. Simply have them create a shake table to demonstrate how different structures react to tremors.

Learn More: YouTube

48. Scratching the Surface

Rocks rock! Get your kiddos to create their very own hardness scales with this super geology project. They can perform scratch tests on different minerals to help them create their scale, and then compare their results to determine which minerals are the toughest in the bunch.

Learn More: All Science Fair Projects

49. Exploring Capillarity

Set your little scientists on a quest to unravel the secrets of capillarity. All they’ll need are humble paper towels, water, and food coloring to answer a pressing question: Does thickness affect speed? As they work, have them record their results to then share their Eureka moments with the rest of their class.

Learn More: 123 Homeschool 4 Me

50. Plastic Bag Biodegradation

This one’s for all the eco-champions in your class! Arm your students with shovels and biodegradable plastic bags before having them bury the bags in some soil to conduct a study on how fast different materials break down. A few weeks later, have them unearth their bags to observe the various states of decomposition.

51. Hydroponics vs. Soil Planting

Green thumbs at the ready! Have your kiddos plant seeds in both soil and a hydroponic setup. Then, over several weeks, guide them in keeping a journal where they document each plant’s growth. By the end, you and your students will have enough data to determine which method is superior for plant growth.

52. Floating on Salt

Have your learners navigate the topic of buoyancy with this fun, floating experiment. They’ll use varying salt concentrations to test if an egg floats better in salted or unsalted water. We guarantee that they’ll be shocked at the difference some salt makes!

Learn More: Science Sparks

53. Make a Compass

Challenge your kiddos to channel your inner navigators as you guide them through the mystical realms of magnetism. Equip them with a needle and a strong magnet before setting them loose to create their very own compasses. Get them to check that their creations work by comparing them against the readings of real compasses. 

54. Fruit Battery Power

This project is perfect for keen little electricians! Have your pupils connect wires to different fruits and show them how to measure which one produces the most voltage. Whether it’s a lemon, an orange, or a banana- they’ll soon discover the shocking truth about the power of fruit!

Learn More: Teaching with Jennifer Findley

55. Natural vs. Synthetic Vitamin C

Lab coats on, everyone! Your kiddos will love this activity where they get to become chemists for the day. Guide them in investigating which has a higher vitamin C content- natural sources or synthetic supplements. Using titration methods with iodine, they’ll quickly discover which source packs the greatest punch.

Learn More: StudyLib

56. Glowing Germs

Switch off the lights, we’re going dark for a germ investigation! Shock your students as you illuminate an unseen world for them. Start by applying a UV-reactive gel to commonly handled objects around the classroom. Next, break out a blacklight and let them observe just how easily those invisible “germs” can spread.

Learn More: Kids Activities Blog

57. Photosynthesis in Different Light Conditions

Let the sun shine! For this interesting project, your kiddos will grow plants under different colored pieces of cellophane and monitor their progress. Show them how to measure growth and assess the plants’ health, so that they can determine which light color is the best for photosynthesis.

Learn More: A Green Muse

58. Effect of Microwave Radiation on Seeds

Have your learners investigate the effects of a microwave with this next idea! Start by getting your pupils to microwave different seeds for varying amounts of time. After they plant them, help them to document the germination and growth rates. You and your class might be surprised to discover that radiation has its pros and cons in the realm of botany!

59. Homemade Barometer

Step aside, weather channel! Your students will be the new meteorologists in town. Start by showing them how to build their own barometers and keep daily logs. To take things a step further, encourage them to try to make connections between atmospheric pressure and weather conditions. 

Learn More: Housing a Forest

60. Impact of Exercise on Memory

Combine a workout with memory drills with this active science project to see if physical activity boosts retention. Get your kiddos moving with an exercise session and then get them to try and complete a memory test. On another occasion, try a memory test on its own and check the difference! This experiment may just produce a generation of fit geniuses!

61. Homemade Spectroscope

Invite your kiddos to step into the multicolored world of spectral analysis with this fantastic project idea! By using simple materials like a DVD, your learners can build their very own spectroscopes. Once complete, you can let them examine various light sources to identify their unique spectra of colors. 

Learn More: Buggy and Buddy

62. Homemade Compost

Dig into sustainable living by getting your kiddos to start a compost bin! As they begin adding different organic materials, they’ll be able to observe the differences in decomposition rates which will give them valuable insights into natural recycling processes.

Learn More: The Happy Housewife

63. Detecting Fake Silver

Real or fake? Let your students decide! Task your students with authenticating real silver using a variety of different methods. From checking its magnetic properties to observing chemical reactions, they’ll have fun exploring all of the various techniques to identify real silver.

Learn more: Kidal

64. Artificial vs. Natural Sweeteners

Let the sugar rush begin! Show your little scientists yeast metabolism in action with this exciting, hands-on activity. They can see the results of yeast on natural and artificial sweeteners by watching balloons fill up with the carbon dioxide produced by the reaction. This project will undoubtedly show them which sweetener really rises to the occasion.

65. Brine Shrimp and Water Quality

It’s time to dive underwater! Have your kids evaluate the effects of water quality on brine shrimp survival. They can start by setting up tap, distilled, and saltwater environments before monitoring which is most shrimp-friendly over the course of a few days or weeks.

Learn More: Home Science Tools Resource Center

66. The Sweetness of Organic vs. Non-Organic Fruits

Hold a sweetness showdown right in your very own classroom! With this fantastic project, your students will get the chance to use refractometers to gauge the sugar content in organic and non-organic fruits. Which fruit will claim sweet victory?

Learn more: YouTube

67. LDR (Light Dependent Resistor) and Light Intensity

Circuit boards at the ready! Have your learners set up a simple electrical circuit featuring a light-dependent resistor and then ask them to measure how its resistance changes with varying light conditions. What an enlightening introduction to electronics!

50 Best 7th Grade Science Fair Projects and Classroom Activities

Engage every student with these 7th grade science fair projects, whether they’re interested in biology, chemistry, physics, environmental science, or any other discipline. Plus, find interesting classroom demos, experiments, and hands-on activities to spice up your lesson plans!

To make it easier to find classroom activities or science fair ideas for 7th grade, we’ve rated all the projects by difficulty and the materials needed:

Difficulty:

• Easy: Low or no-prep experiments you can do pretty much anytime
• Medium: These take a little more setup or a longer time to complete
• Advanced: Experiments like these take a fairly big commitment of time or effort
• Basic: Simple items you probably already have around the house
• Medium: Items that you might not already have but are easy to get your hands on
• Advanced: These require specialized or more expensive supplies to complete

Biology and Ecology Science Fair Ideas for 7th Grade

Want to learn more about animals or human behavior, the environment around you, or other life science topics? Try these 7th grade science fair projects.

Learn whether color affects memory

Difficulty: Easy / Materials: Medium

Can certain colors improve your memory? This experiment explores that idea using different text, background colors, and blue light settings on devices.

Learn more: Colors and Memory at Education.com

Explore how sugary drinks affect teeth

The calcium content of eggshells makes them a great stand-in for teeth. In this experiment, students use eggs to determine how soda and juice stain the teeth and wear down the enamel. (Bonus: Have students try different toothpaste and toothbrush combinations to see how effective they are.)

Learn more: Eggshell Experiment at Feels Like Home

Extract DNA from an onion

Difficulty: Medium / Materials: Medium

Learn how to extract DNA from an onion (most of what you need you can find at home, and you can get 95% ethanol at Amazon ). Then, turn it into an experiment by applying the theory to other fruits or vegetables to see if you can get similar results.

Stretch your mind with a flexibility experiment

Difficulty: Medium / Materials: Basic

Find out how important stretching really is by comparing the flexibility of willing test subjects before and after stretch exercises. This is a great experiment for fitness fans.

Learn more: Flexibility Experiment at We Have Kids

Construct a DIY grow box

Design a grow box using a cardboard box, foil, and a plug-in light socket . Then, use it for all kinds of plant-based science fair ideas for 7th grade students.

Learn more: DIY Grow Box at Uplifting Mayhem

Collect and control biofilm

Bacteria that accumulate on objects in the water form a substance called biofilm. In this 7th grade science fair project, students build an apparatus to collect biofilm and then experiment with ways to reduce the amount of biofilm that accumulates over time.

Learn more: Biofilm Experiment at The Homeschool Scientist

See if caffeine helps you type faster

People seek out a jolt of caffeine when they’re feeling sluggish, but does it really help them perform better? This 7th grade science fair project tasks students with answering that question using the scientific method.

Find out if all plants are phototropic

You probably already know that many plants grow toward the light. But do all of them respond in the same way? Test several types of plants to find out.

Devise a water filtration system

Plenty of homes use water filtration systems these days, but how do they really work? This chemistry experiment explores how charcoal filters impurities from drinking water.

Learn more: Water Filtration at The Homeschool Scientist

Determine whether text abbreviations are a new language

Kids are fluent in text-speak, but does it really count as a whole new language? In this 7th grade science fair project, students research language and the history of texting, then compile a texting glossary and consider texting’s practical applications.

Learn more: Text Language at Education.com

Chemistry Science Fair Ideas for 7th Grade

If you’re fascinated by test tubes, beakers, and Bunsen burners, check out these interesting 7th grade science fair projects and ideas.

Design your own slime

Chances are good your students already love making and playing with slime. Turn the fun into an experiment by changing the ingredients to create slime with a variety of properties, from magnetic to glow-in-the-dark!

Copper-plate some coins

Students need just a few simple supplies to perform electroplating, but the results are always impressive. (Get copper strips  and 9V battery snap connectors with alligator clips on Amazon.) Turn this into a 7th grade science fair project by changing up the variables (does temperature matter?) or items being electroplated.

Learn more: Electroplating at KiwiCo

Swab and test for germs

Germ experiments are one of the most popular science fair ideas for 7th grade students. Swab household items, school supplies, and more to discover what’s living on the items around you.

Learn more: Germ Experiment at Angelic Scalliwags

Spherify your favorite beverage

Spherification is a hot trend in top restaurants, but 7th grade science students can easily replicate it at home with a spherification kit . This is a cool chemistry experiment, and tasty too!

Test calorie counts in packaged foods

Ever wonder how scientists determine how many calories are in your food? Try this experiment to find out!

Explore mummification

First, learn how to mummify a hot dog using baking soda as a desiccant. Then, experiment with other desiccants or items to turn this into a bona fide experiment.

Play around with oxidation

Can you find a way to slow or prevent oxidation (rusting)? This is one of those 7th grade science fair ideas that’s simple in concept but has lots of practical applications.

Learn more: Oxidation Experiment at Teach Beside Me

Blow hot or cold bubbles

Blowing bubbles may sound like too much fun for a science project, but when conditions like temperature are altered, the experimental part kicks in. What conditions do you need to blow a bubble that freezes?

Learn more:  Bubble Life & Temperature at ThoughtCo.

Whip up some eggshell chalk

Use the calcium in eggshells to make your own sidewalk chalk. Then, tinker with the recipe to see if you can make the chalk last longer, resist water, or other variables.

Learn more: DIY Chalk at Kidspot

See the effect of acid rain on plants

Difficulty: Easy / Materials: Basic

This simple project tests whether acid rain has any effect on plant life, using vinegar in place of fossil fuels. Experiment with different acid concentrations and pH levels for a more advanced version.

Learn more: Acid Rain Experiment at STEAM Powered Family

Physics and Engineering Science Fair Ideas for 7th Grade

Explore the laws of motion, the science of energy, or STEM challenge engineering ideas through 7th grade science fair projects like these.

Drive a balloon-powered car

Engineer a balloon-powered car using basic materials from around the house (even the wheels are bottle caps!). Experiment to see how far or fast you can make the car go.

Learn more: Balloon Car at Prolab

Construct a geodesic dome

Budding engineers will love designing, building, and testing the strength of the fascinating geodesic dome. This experiment requires nothing more than newspaper and masking tape!

Design a solar oven

Students experiment with the best way to build a solar oven, exploring thermal energy, reflection, convection, and other physics concepts. They can serve up their experiment results along with their final reports!

Learn more: Solar Oven at Children’s Science Center

Lend a helping hand

This is a great individual or group 7th grade science project, as it encourages students to use and hone their design and engineering skills to make a working model of a hand. If you’ve got robotics skills, take this project to a more advanced level.

Build a Da Vinci bridge

There are plenty of bridge-building experiments out there, but this one is unique. It’s inspired by Leonardo da Vinci’s 500-year-old self-supporting wooden bridge. Build a model and test the amount of weight it can hold, or craft a full-size version to put Da Vinci’s plan into action.

Construct a water clock

You’ll blow your 7th grade science students’ minds when you tell them they’re going to build a clock using engineering that’s been around for thousands of years. The supplies are simple, but the results are pretty neat!

Learn more: Water Clock at STEAM Powered Family

Generate electricity

In this science fair project, kids build a generator from scratch. Turn it into an experiment by varying the materials to see if you can increase the amount of energy it produces.

Test the elasticity of balloons

Explore whether heat and cold have an effect on elasticity using balloons. Try this with other materials too to expand the project. ( Find more balloon science here! )

Freeze water in an instant

Explore the concept of nucleation (the process of chain reactions) by turning water into ice in seconds! Make this a 7th grade science fair project by trying the same process with other liquids.

Auto-feed your pet

Difficulty: Advanced / Materials: Advanced

Can you build a device that feeds your pets automatically? Even better, can you make it inexpensive and easy for others to build too? This project has real practical applications.

7th Grade Science Classroom Demos, Experiments, and Hands-On Activities

Use these classroom activities to teach human biology, mechanical engineering, and more physics and chemistry concepts in engaging and exciting ways.

Use Oreos to teach mitosis

A 7th grade science activity that doubles as a sweet treat? Your students are going to love this activity using Oreo cookies and colorful sprinkles to make cellular mitosis models.

Learn more: Oreo Mitosis at Ballin With Balling

Twist pipe cleaners to explore meiosis

Meiosis is similar to mitosis, but it’s specific to the production of gametes. These hands-on models use basic materials like pipe cleaners and beads to make the process easier to visualize.

Learn more: Meiosis Models at Science Prof Online

Teach about “Homer-o-stasis”

Difficulty: Medium / Materials: Advanced

This is such a fun way to teach kids about the concept of homeostasis! Get all the instructions you need at the link.

Learn more: Homer-o-stasis at The Trendy Science Teacher

Sort jelly beans to learn genetics

If you’re learning about how genetic traits are passed along from parent to child, try this jelly-bean demo. When you’re finished, you can enjoy a sweet treat!

Learn more: Jelly Bean Genetics at The Owl Teacher

Design a pinball machine

Give your class basic supplies like rubber bands, plastic cups, and cardboard boxes. Then challenge them to create their very own pinball machines!

Learn more: Pinball STEM Challenge at Student Savvy

Conduct a carbon cycle lab activity

If you’ve got access to some basic chemicals, conduct this lab that helps students see the carbon cycle in action using their own breath.

Learn more: Science Lessons That Rock

Make a tea bag float on air

This easy experiment is a cool way to show kids how heat affects air molecules, making hot air rise. They’ll need some supervision with the fire, so try this out on the playground for extra safety.

Learn more: Floating Tea Bags at Coffee Cups and Crayons

Learn how salt affects density

Explore the salinity of various bodies of water, then re-create their waters to see if you can make an egg float or sink. Experiment with other objects too.

Learn more: Saltwater Density at Uplifting Mayhem

Watch the greenhouse effect in action

Climate change can be a contentious topic, so start by teaching kids about the greenhouse effect, which is easy to see and understand. Then, urge them to explore data collected by other scientists so they can learn to make informed decisions about topics like global warming.

Learn more: Greenhouse Effect at Teaching Science With Lynda

Blow bubbles to explore cell membranes

Kids are never too old to enjoy bubbles, so use them to learn more about cell membranes in this fun 7th grade science activity.

Learn more: Cell Membrane Bubbles at The Trendy Science Teacher

Marvel at a density rainbow

We learn early on that oil floats on water, but where do other liquids fit in? Students find out when they conduct this colorful density experiment that has them layer different substances, making a rainbow.

Ride the wave (machine)

Learning about wave action? Build this surprisingly easy wave machine for hands-on exploration.

Learn more: Wave Machine at Engaging Science Labs

Create a taxonomy system

Students can step into Linnaeus’ shoes by creating their own system of taxonomy using a handful of different dried beans. This is a fun 7th grade science project to do in groups, so students can see the differences between each group’s system.

Learn more: Taxonomy Project at Our Journey Westward

Bake an edible cell model

Sure, students could build a cell model out of clay, but cake and candy are so much more delicious! Check out the link below to see how one teacher does it.

Learn more: Edible Cell Model at Weird Unsocialized Homeschooling

Swing a glass of water

This classic science experiment teaches kids about centripetal force. Be forewarned: This could potentially make a bit of a mess, so consider taking this one outside.

Simulate natural selection with a lab activity

Travel to the Galápagos Islands and follow in Darwin’s footsteps as students explore finch beak adaptations in this clever natural selection lab.

Learn more: Natural Selection Lab at Teach To Serve

Participate in Project FeederWatch

Citizen science projects bring science to life for kids! One of our favorites is Project FeederWatch, where kids put out bird feeders and then count and report on their visitors. This is a great way to build a love of birding for life.

Learn more: Classroom Resources at Project FeederWatch

Experiment with basic substances to learn about chemical change

If you’re introducing lab work and chemistry basics to 7th graders, this easy lab is a great way to do it. They’ll learn safety procedures and get to feel like “real” scientists as they pour, mix, swirl, and more.

Learn more: Chemical Change Lab at Super Sass and Science Class

Assemble an edible DNA model

DNA models are always more fun when you can snack on them afterwards. Want to make this a healthier activity? Use fruits and veggies to make models instead.

Learn more: Edible DNA Model at Hess UnAcademy

Craft a food web marble maze

Combine a STEM challenge with learning about food webs in this clever project. Kids will love the hands-on aspect, and it will really help the learning stick.

Learn more: Food Web Marble Maze at Teach Savvy

Keep the STEM learning going with these 15 Items All Middle School Math Classrooms Need .

Plus if you like these 7th grade science fair projects, sign up for our newsletters and get all the latest teacher tips and ideas, straight to your inbox.

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Okay, this is the hardest part of the whole project…picking your topic. But here are some ideas to get you started. Even if you don’t like any, they may inspire you to come up with one of your own. Remember, check all project ideas with your teacher and parents, and don’t do any project that would hurt or scare people or animals. Good luck!

• Does music affect on animal behavior?
• Does the color of food or drinks affect whether or not we like them?
• Where are the most germs in your school? ( CLICK for more info. )
• Does music have an affect on plant growth?
• Which kind of food do dogs (or any animal) prefer best?
• Which paper towel brand is the strongest?
• What is the best way to keep an ice cube from melting?
• What level of salt works best to hatch brine shrimp?
• Can the food we eat affect our heart rate?
• How effective are child-proof containers and locks.
• Can background noise levels affect how well we concentrate?
• Does acid rain affect the growth of aquatic plants?
• What is the best way to keep cut flowers fresh the longest?
• Does the color of light used on plants affect how well they grow?
• What plant fertilizer works best?
• Does the color of a room affect human behavior?
• Do athletic students have better lung capacity?
• What brand of battery lasts the longest?
• Does the type of potting soil used in planting affect how fast the plant grows?
• What type of food allow mold to grow the fastest?
• Does having worms in soil help plants grow faster?
• Can plants grow in pots if they are sideways or upside down?
• Does the color of hair affect how much static electricity it can carry? (test with balloons)
• How much weight can the surface tension of water hold?
• Can some people really read someone else’s thoughts?
• Which soda decays fallen out teeth the most?
• What light brightness makes plants grow the best?
• Does the color of birdseed affect how much birds will eat it?
• Do natural or chemical fertilizers work best?
• Can mice learn? (you can pick any animal)
• Can people tell artificial smells from real ones?
• What brands of bubble gum produce the biggest bubbles?
• Does age affect human reaction times?
• What is the effect of salt on the boiling temperature of water?
• Does shoe design really affect an athlete’s jumping height?
• What type of grass seed grows the fastest?
• Can animals see in the dark better than humans?

Didn’t see one you like? Don’t worry…look over them again and see if they give you an idea for your own project that will work for you. Remember, find something that interests you, and have fun with it.

To download and print this list of ideas CLICK HERE .

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Science Struck

Stop Worrying, 7th Grades! Here are 35 Rad Science Fair Topics

Making projects for science fair topics for 7th grade is a unique way in teaching children scientific concepts that are difficult to understand. Which is why they must be fun, creative, and easy to try.

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Academics beyond textbooks and classroom walls make a better impact. Science fairs projects are one such kind of learning medium, where the toughest topics can be explained with interesting models and graphical representations. With a little help, any subject can be turned into an eye pleasing science fair project. To make science fair topics for 7th grade worth the effort, let the students pick the topics they like.

List of Science Fairs Topics for 7th Grade

• How does a magnet affect radish plant growth?
• Does temperature affect the performance of a fuel cell?
• Which building design will best withstand an earthquake?
• What techniques do air traffic controllers use to control air traffic? How efficient are these techniques?
• How does temperature affect the survival rate of aquatic plants?
• Can animals see in the dark better than humans? Explain how.
• Does shoe design really affect an athlete’s jumping height?
• What kind of fertilizers work better? Natural or synthetic?
• What light brightness makes plants grow the best?
• How much weight can the surface tension of water hold?
• Can people tell artificial smells from real ones?
• How does music affect animal and plant behavior?
• What is the best way to prevent an ice cube from melting?
• How is out heart rate affected by the food we eat?
• What are the terrible effects of acid rain?
• Can background noise levels affect how well we concentrate?
• Do antioxidants really improve a human’s life span?
• How does temperature affect the growth of yeast or mold on bread?
• Does the species of wood affect the rate at which it burns?
• How does talking on a cell phone or listening to music affect reaction time?
• Do we remember a sequence of letters and numbers better if they hear or see the sequence first?
• What is the importance of breakfast in our lives? How does it affect our metabolism rate?
• How does music influence learning and memory?
• Do daily memory-oriented activities slow memory loss at occurs with aging?
• How does caffeine and nicotine affect bacterial growth?
• What antibacterial properties do extracts from basil and mint plants have?
• What effects do garlic and vitamin C have on high blood pressure in people?
• Does the Atkins high-protein diet really work?
• How does exercise affect heart rate recovery?
• How does light affect the vitamin C content of juice?
• How effective are herbal oils and DEET as mosquito repellents?
• Can vocal wave form patterns be used to identify individuals?
• Can computer systems for recognizing human motion be used to counter terrorism?
• How does sunspot activity affect radio reception?
• How does the air temperature affect carbon monoxide emissions when a car is first started?

Participating in science fair projects encourages the child to read and learn more about myriad subjects. Getting involved in your child’s academics will not only motivate the child but also help you develop a bond of trust and reliability. However, you need to support the child and not do the project for him. Doing the entire project by yourself will make your child handicapped and defeat the whole purpose of the science fair.

The above list science fair topics for 7th grade are extremely easy to do. Ask your child to write a script to explain to the viewers what the project is all about. The simpler the script, the easier it is for him to understand and to explain it. Science fair projects help a great deal in explaining scientific concepts in a jiffy.

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Measurable Science Fair Ideas

Good Science Fair Project Ideas for the 7th Grade

Good science fair projects must be measurable. Your topic should ask a question that you can test, which enables you to research the topic and formulate an informed hypothesis regarding the outcome you expect. You can then design and conduct your experiment, collecting and measuring data based upon which you draw conclusions.

How Well Do Plants Grow with Other Liquids

Test the impact of liquids other than water on plant growth. Design your experiment based on feeding one plant with water, another with milk, a third with orange juice and a final pot with vinegar. Be sure all other conditions, such as exposure to sun, are consistent with all four pots. Record each plant’s growth daily using both a ruler as well as a digital camera to store evidence of your experiment and the results. Add other liquids to expand your experiment. For example, test the results of flavored water or soda on plant growth.

What Type of Batteries Last the Longest

Test the duration of AA battery types. Purchase two sets of brand new AA standard batteries, heavy duty batteries, alkaline batteries and rechargeable batteries with a charger. Set a battery-operated clock to 12:00. Put each set of batteries into the clock, and record the time the clock stops, which will tell you how long that particular type of battery lasted. Test the same type of battery in the clock again, and average the time of both trials. Repeat this procedure with each type of battery. Test the batteries in other devices to ensure results are consistent across the board.

What Type of Fertilizer Produces the Fastest Growth

Test both organic and inorganic fertilizer on the growth of grass. Purchase six peat cups from your local greenhouse. Fill each pot with the same soil and same amount of grass seed. Fertilize three with organic fertilizer and the remaining three with inorganic fertilizer. Water each cup with the same amount of water every other day. Add more fertilizer once a week. Measure the growth of the grass every three days over a three-week period. Determine which fertilizer, organic or inorganic, facilitates the fastest grass growth.

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• Julian Trubin.com: Science Fair Projects
• Discovery Education: Choose a Science Project

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The Big List of Science Fair Project Ideas, Resources, and More

Options for every age, interest, and skill level!

Science fairs are a rite of passage and something many kids either dread or adore. Whatever the case, there’s no doubt these projects give students a chance to develop all sorts of skills: critical thinking, presentation and public speaking, research and writing, and so much more. Make this year’s fair the best one ever with this huge list of science fair project ideas for every kind of student.

Tips for Choosing a Science Fair Project

Source: @eriverselementary

With thousands of possible projects, it can be difficult to narrow down something that’s a good fit for every student. Try these tips to help them find the right science fair project ideas.

Match Your Project to Your Interests

This seems obvious, but it’s really helpful for kids who feel overwhelmed by all the choices. It’s also a good way to get reluctant learners more excited about science fair projects. Encourage students to think about what they love to do in their spare time. How can they turn that into a project?

For instance, kids who love sports might explore the most effective stretches for warming up, or methods for throwing a football farther and more accurately. Music lovers can learn how sound waves work, or discover the link between music and emotions. It’s all about starting with something you love.

Challenge Yourself, But Keep It Realistic

Science fair projects need to be something kids can complete by themselves or with adults in support roles only. If a student picks something that’s way beyond their skill level, chances are the parents will wind up doing most of it. That being said, the point of the project is to learn and grow. Aim to learn something new, whether it’s knowledge or skills, by setting measurable goals.

If You Want To Win, Be Innovative

For science fair contests with prizes, the more creative you can be, the better. Projects that address real-world problems with new and interesting solutions often catch the judges’ eye. Be sure to be thorough in your research, and be ready to answer questions about your methods and results. Scientists love asking questions!

Science Fair Project Ideas by Grade

Source: @delphiacademy

Finding an age-appropriate project is an excellent way to help kids succeed. These lists cover every age, pre-K to grade 12. Remember that many simple experiments and demos can become true projects by changing up the methodology to achieve better or different results.

• Preschool Science Experiments and Activities
• Kindergarten Science Projects, Activities, and Experiments
• 1st Grade Science Projects and Activities
• 2nd Grade Science Experiments and Projects
• 3rd Grade Science Projects and Activities
• 4th Grade Science Experiments, Activities, and Projects
• 5th Grade Science Projects and Experiments
• 6th Grade Science Experiments, Projects, and Activities
• 7th Grade Science Fair Projects and Classroom Experiments
• 8th Grade Science Fair Projects and Classroom Experiments
• High School Science Experiments for Labs and Science Fairs

Science Fair Project Ideas by Interest

Source: @project.learn.community

Since most projects can be tweaked to be suitable for any age, it’s best to urge kids to pick projects that really interest them. These roundups offer ideas for various interests in disciplines ranging from bio and chemistry to physics and environmental science.

• Anatomy Science Projects and Activities
• Animal Habitat Activities and Projects
• Balloon Science Experiments and Projects
• Climate Change Activities and Project Ideas
• Electricity Experiments and Science Projects
• Ocean Experiments, Projects, and Activities
• Plant Life Cycle Projects and Experiments
• Science Projects for Learning About Germs
• Space Science Experiments and Activities
• Volcano Science Experiments and Project Kits
• Weather Activities and Science Projects

STEM Challenge Science Fair Projects

Source: @qmsduncan

For students especially interested in physics or engineering, STEM challenges can lead to amazing science fair project ideas. Check out these lists for engaging challenges, and watch the learning grow.

• Kindergarten STEM Challenges for Little Learners
• 1st Grade STEM Challenges Kids Will Love
• 2nd Grade STEM Challenges To Encourage Creative Thinking
• 3rd Grade STEM Challenges for Scientific Learning
• 4th Grade STEM Challenges That Make Learning Fun
• 5th Grade STEM Challenges for Hands-On Exploration
• STEM Challenges That Use Ordinary Office Supplies

Engaging Reluctant Science Fair Participants

Source: @aubkov

Let’s face it: Not every kid gets excited about the idea of a science fair. But with the right science fair project ideas, you can draw in even the most reluctant learners. Try some of these options.

• Edible Science Projects You’ll Actually Want to Eat : There’s something about getting to eat your project that excites nearly every kid.
• Wet and Wild Outdoor Science Activities and Experiments : Get kids out of the classroom and let them make a mess outdoors. Perfect for kinesthetic learners!
• 60 Easy Science Experiments Using Materials You Already Have On Hand : While you always want kids to challenge themselves as they learn, that doesn’t mean their science fair project needs to be incredibly complicated. These simple activities with household materials help students learn too.
• 50 Ste m Activities To Help Kids Think Outside the Box : These fun, quick, hands-on projects are perfect for creative thinkers.

More Science Fair Resources

Choosing a project is just the first part of the process. Find more useful tips and project help here.

• Free Printable: Scientific Method Graphic Organizer
• An Easy Way To Create Science Fair Project Boards
• Free Bulletin Board Kit That Teaches Students to “Think Like an Inventor”

Want to talk to other science teachers about running a school science fair? Join the WeAreTeachers HELPLINE group on Facebook to exchange ideas and ask for advice!

Plus, the best science websites for middle and high school ..

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