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Science Fair Project Ideas

Education.com has assembled a vast collection of science fair project ideas written by science teachers, professional scientists, and educational consultants on popular science fair topics ranging from physics and chemistry to biology and even sociology. We offer free science fair ideas suitable for every grade level, be it preschool, kindergarten, elementary school, middle school, or high school. Check the boxes in the sidebar to filter your results, or use the search bar to find that perfect science fair project or experiment your child will be sure to love.

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In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.
Earth & Space Science
Geology
Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.
Astronomy
Third Grade
This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.
Ecology
Environmental Issues
Little ones looking to get their hands dirty will love this series of fun plant experiments for kids that teach essential plant biology concepts such as photosynthesis, transpiration, capillary action, and tropisms in fun and hands-on ways. Little green thumbs get to do everything from literally cloning cabbage (which is actually quite easy to do, and very cool) to building their own working greenhouses. Check it out!
Environmental Issues
Ecology
Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.
Health and Medicine
Fifth Grade
This experiment investigates if stress alters body temperature.
Health and Medicine
Middle School
Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.
Environmental Issues
Fourth Grade
Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.
Geology
Weather and Climate
This science experiment tests if dog saliva can really help heal wounds.
Health and Medicine
Elementary School
Culverts transport seeds away from their original location to different places. This science project examines the effect of culverts on plant growth in streams.
Earth & Space Science
Middle School
Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.
Earth & Space Science
Elementary School

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