science fair experiment ideas 7th grade

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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
• 150 Journal Prompts for Kids, Middle & High School Students
• 151 Best Summer Jobs for Teachers
• Teacher Tools

Sarah Mininsohn

With a BA from Wesleyan University and an MFA from the University of Illinois at Urbana-Champaign, Sarah is a writer, educator, and artist. She served as a graduate instructor at the University of Illinois, a tutor at St Peter’s School in Philadelphia, and an academic writing tutor and thesis mentor at Wesleyan’s Writing Workshop.

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75+ Best Science Fair Ideas for 7th Grade

Inspire your students to explore biology, chemistry, and more.

It’s science fair time! You can use science fairs to engage students in completing a formal experiment from hypothesis to conclusion, or you can use the opportunity for students to create, demonstrate, and explain a science concept or phenomenon. Whatever your approach, we have the best science fair ideas for 7th grade. Use this list for science fair ideas for biology and environmental science, chemistry, physics, or engineering.

We’ve organized the science fair ideas to help students figure out which project is right for them.

Level of difficulty:

• Easy: Allows students to engage in a topic that is familiar and that they may have studied in previous grades
• Medium: Requires students to do additional research or learn about a topic that can be difficult
• Advanced: Requires a deep understanding of a complex topic
• Basic: Materials can be found around the house
• Medium: Some materials will have to be purchased
• Advanced: Student may have to find materials in the science lab or specialty stores

Best Biology and Environmental Science Fair Ideas for 7th Grade

These projects are ideal for students who love biology (mitosis, meiosis, genetics) and environmental science (ecosystems and habitats, etc.). Students will find projects that lend themselves to data collection, demonstration, and experimentation.

Make a solar oven

Difficulty: Easy / Materials: Basic

This experiment is great particularly if you live in a hot, sunny area. Students create an oven using a cereal box and materials they have around the house. Then, use it to cook a s’more. 

Learn more: Solar Oven Science Experiment

Grow biofilm

Difficulty: Medium / Materials: Medium

Biofilm are the bacteria that grow on surfaces. Students can grow biofilm, and explain how they may grow differently on different surfaces. They can also explain any benefits or drawbacks to having biofilm on surfaces.

Learn more: Biofilm Experiment

Plant light maze

Difficulty: Medium / Materials: Basic

Students build a maze for a plant to grow through using a shoebox with obstacles students build in and a light source at one end. This experiment takes some planning but the result is impressive. 

Learn more: Plant Light Maze

Make a solar eclipse viewer

If you have a science fair that occurs during a solar eclipse event, making a solar eclipse viewer and documenting the experience of viewing and understanding the eclipse makes a great science project. 

Learn more: Make a Solar Eclipse Viewer

Demonstrate phototropism

Difficulty: Easy / Materials: Medium

Phototropism is the way that plants move in response to light. Students set up a demonstration and record what happens. They can use paper and pencil or a video to show and explain what happens to their plants.

Record bird sightings

This is a great way to build a love of birding for life. Students can make and hang their bird feeders, then record their data over a month or more and share it at the fair.

Learn more: Cornell Lab Project FeederWatch

Use Oreos to model 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

Model meiosis with pipe cleaners

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

Jelly-bean 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

Model the carbon cycle

Take students’ knowledge of cycles up a notch by focusing on the carbon cycle. Students create and explain a model of the carbon cycle. (Bonus: add in some physics and see if students can add movement to their models.)

Measure carbon content

In this experiment, students measure the carbon content in various household products.

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

Watch the greenhouse effect happen

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

Model cell membranes with bubbles

Students learn about cell membranes and teach others using bubbles in this demonstration.

Learn more: Cell Membrane Bubble Lab

Bake a 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

Simulate natural selection

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

Food chain 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

Water filtration

Show how different materials filter water and how we can clean water using different methods. Students can create filters with one type of material in each, and different combinations to compare how well each filters water.

Acid rain and plants

Show how acid rain impacts plants. This experiment provides a good, dramatic result for students to showcase.

Create a grow box

Students show what they know about how plants grow and what they need by creating a grow box. Students who are especially interested in building will enjoy this project.

Learn more: Build a Grow Box

Best Chemistry Science Fair Ideas for 7th Grade

Chemistry experiments can be the most fun because they create the biggest bang, literally. Here are a variety of chemistry science experiments that 7th graders can run with.

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.

Model homeostasis

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: Homeostasis Lab

Make teabags fly

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: Flying Tea Bag Experiment

Show how salt impacts 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

Make 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.

How materials impact teeth

Show how different liquids impact our teeth using eggs as a stand-in for our pearly whites. A great experiment to talk about practical implications.

The magic milk experiment, where students show how molecules and substances interact, is a great one to do on the spot. Push the science by having students explain what is happening at the molecular level and hypothesize how this interaction could happen using other substances. 

Learn more: Magic Milk Experiment

Split water

Difficulty: Advanced / Materials: Advanced

Students use a battery and pencils to show how water splits into hydrogen and oxygen. They can tell which gas is which by observing the number of bubbles that are in each stream (hydrogen will have double the bubbles as oxygen). This is another great experiment to model at the fair. 

Fizzy driving car

Show how a chemical reaction (candy and soda) can power a car. Students can demonstrate and be ready to answer questions about how this reaction is strong enough to move an entire car. 

Learn more: Candy & Soda Balloon Experiment

At the speed of melting ice

This is another experiment that can be done at home and reported on at school. Students put ice into different bowls and see which conditions make it melt fastest. Challenge 7th graders by having them create their conditions to isolate the dependent variable as much as possible, and to be as specific as possible in their explanation. 

Elephant toothpaste

Who doesn’t love an exploding experiment? This experiment uses a reaction between hydrogen peroxide and yeast, soap, and food coloring to create a huge multi-colored foam explosion. 

Learn more: Elephant Toothpaste Experiment

Invisible ink

Students who want to understand how chemicals react can use basic household materials to create invisible messages, and teach their friends how to do the same. Explain the reaction and set up a station for students to explore how to write their own invisible messages. 

Mentos and Coke explosion

This is an experiment that kids may have done at home, but bring it to the science fair by having them dissect what’s happening at the molecular level.

Learn more: Mentos and Coke Experiment

Translucent egg experiment

Students explain acids, bases, and chemical reactions with this demonstration. They’ll have to conduct the experiment at home and be ready to answer questions on fair day.

Learn more: Egg and Vinega r Experiment

Polymer bouncy balls

Another science demonstration with a fun outcome. Students demonstrate how changing the ingredients that you use to make a ball changes its properties.

Make rock candy

Show how crystals grow, and how seed crystals change the rate that rock candy grows by making different batches of rock candy and seeing which factors impact the final result.

Metal corrosion

In this experiment, students set up the conditions for different materials to rust and then collect data as the materials, well, rust. It’s a good way to practice a controlled experiment and data collection.

Mummified hot dog

Use baking soda to mummify a hot dog and explain how chemical reactions can change something, like a hot dog, dramatically.

Make fluffy slime

What would a science fair be without slime? Challenge students to make slime with different substances to predict and learn how it turns out.

Learn more: How To Make Slime

Boiling point of water

Students add varying amounts of salt and other soluble materials to water and see how it affects the boiling point. A great opportunity for data collection.

Make a lava lamp

Students demonstrate a common chemical reaction by making a lava lamp. This is a fun option for a science fair project because students can lead participants through the process.

Best Physics Science Fair Ideas for 7th Grade

Physics experiments and projects are all about moving things around in lots of different ways. These cool physics experiments will test students’ physics knowledge and perseverance as they try to get their projects to work just right.

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 balloon elasticity

Explore whether heat and cold have an effect on elasticity using balloons. Try this with other materials too to expand the project.

Learn more: Balloon Science

Make a pet auto-feeder

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.

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

Demonstrate centrifugal force

This classic science experiment teaches kids about centripetal force. Be forewarned: This could potentially make a bit of a mess, so consider where this science fair project is placed.

Another way to demonstrate centrifugal force

Here’s another way to demonstrate centrifugal force. Students can set up the demonstration and let participants try it out.

Paper airplane dynamics

Students can explore aerodynamics by making and testing paper airplanes. Which paper airplane features make the plane fly the farthest? How does aerodynamics explain this? 

Learn more: Paper Airplane Designs

Potato battery

Another way to make a battery—students can use what they have in their pantry. After they create a potato battery, they figure out how to use it and explain why it works.

Paper roller coaster

Test and demonstrate the laws of physics with a paper roller coaster. This is a great fair experiment because participants can join in the fun, sending marbles along each roller coaster students make.

Maglev train

Show how magnets work with a maglev train. Students use wooden blocks with magnets to show how magnets can attract and repel to create movement or attraction. 

Tornado in a bottle

Another classic science experiment, students show how tornadoes funnel using 2 liter bottles, water, and a tornado connector tube. Add LEGO bricks or small toy animals to show how a tornado impacts objects it comes into contact with. 

Learn more: Tornado in a Bottle

Demonstrate waves

Students learn about compression and transverse waves, and how to show each with a common slinky. This is a great project for a student who has mastered the middle school content and is ready for more.

Learn more: Teaching Students About Waves

Balloon-powered car

Use a balloon and building materials to create a car that shows how force works. If more than one student selects this as their project, compare the result. Which car moves the fastest and why?

How the strength of a magnet varies by temperature

Students test how strong magnets are, and what happens when the magnet changes either by heating up or cooling down.

Measure the surface tension of water

Students research surface tension and how to measure it, then they set up their station and teach others how to understand surface tension.

Penny battery

Make a battery using pennies, aluminum foil, and a water-salt solution. Seventh graders can explain what’s happening to make the battery work and find a creative way to show the power of their battery.

Best Engineering Science Fair Ideas for 7th Grade

For students who like to build, build, build, engineering projects are a perfect science fair project. These engineering ideas are doable for middle schoolers and have practical applications they can talk about.

Make a robotic hand

Students engineer a robotic hand and can demonstrate it at the science fair. So cool!

Light switch box

Students learn about electricity while making a light switch box. Challenge them to find a practical use for their new knowledge about how electricity works.

Rubber band helicopter

Create a helicopter and explain how it flies using materials you have around the house. Students can also get creative using different-size rubber bands or testing various materials that are heavier or lighter.

Learn more: Rubber Band Helicopters

Design an eco-friendly house

This project requires research into what makes a house eco-friendly, and then creativity to design a house model that would be eco-friendly. Students can also calculate the amount of carbon their house would save if it were functioning.

Make a windmill

Difficulty: Advanced / Materials: Medium

Another eco-friendly idea, have students make a windmill. If they can get it going and producing energy, they’ll really have something to show off.

Design a weather-proof house

Students choose a type of extreme event (earthquake, tornado, hurricane) and design a house or structure that they think would sustain that event. Then, they test it on a small scale and talk about their results.

Build a hydraulic lift

Design a lift using water. Such a cool way to demonstrate engineering and physics.

Learn more: Design a Hydraulic Elevator

Make a Rube Goldberg machine

Difficulty: Advanced / Materials: Basic

The idea behind a Rube Goldberg machine is to create a complex machine to solve a simple problem. This is a great project for students who want an extra challenge.

Make a weather station

This project can be as complicated or simple as students want. They can show ways to measure and track weather using household objects, or they can figure out how to use solar power to provide energy to power a station. Either way, they’ll have something to talk about.

Buy it: DIY Weather Station at Amazon

Bridge design

There’s a lot students can do with bridges: design them and analyze the structure and load they can take, measure how well they do in simulated disasters, and see how much support a bridge needs to span a long distance. The possibilities are endless!

Learn more: Check out how one student tackled bridges in his science fair project.

Design a catapult

Students learn the engineering and physics of catapults, and set up various examples for participants to try. Students can make catapults as large or small as they want.

Learn more: Catapult Project

Make a pendulum

Students research pendulum and movement, and then create various demonstrations, like this paint pendulum, to show participants how pendulums work.

Make a saltwater battery

Students demonstrate how to use salt water to create a battery and move voltage from one location to another.

Earth Science Project Ideas for 7th Grade

You’ll always have students who are into rocks, dinosaurs, the earth, and more. These ideas allow those students to dive deep (pun intended) into geology and earth science.

Test how hard rocks are

Yes, all rocks are hard, but some are harder than others. Students learn about how rocks are classified, collect and test rocks in your area, and present what they learn.

Learn more: Rock Experiment

Show plate tectonics with crackers

Students research plate tectonics and use graham crackers and frosting to model them. Delicious and educational!

Make the layers of Earth

Students may be familiar with the layers of Earth, but allow students to dig deeper by figuring out a way to present the layers incorporating detail and explanation that go beyond the crust.

Learn more: The Layers of the Earth

Explain oil spill cleanup

Students research how oil can be cleaned up and model it on a small scale. This project combines physics, chemistry, and earth science.

Learn more: Oil Spill Cleanup

Volcano eruption

This is a classic science fair experiment, but it’s worth including because 7th graders can take the explanation and volcano models to the next level with their research and explanation.

Learn more: Baking Soda Volcano Experiment

Soil erosion experiment

Students show how soil erodes and discuss the implications for gardening, planners and construction, and the earth in general.

Learn more: Soil Erosion Experiment

Also check out 34 Famous Scientists Everyone Should Know .

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

Options for every age, interest, and skill level! Continue Reading

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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!

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 .

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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.