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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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Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.
Oceans
Second Grade
In this science fair project, students use the streak test to tell minerals apart from each other.
Earth & Space Science
Geology
In this science fair project, students make their own rain gauge to measure rainfall.
Weather and Climate
Fourth Grade
The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.
Ecology
Environmental Issues
Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!
Astronomy
Third Grade
Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.
Weather and Climate
Fourth Grade
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
This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.
Ecology
Elementary School

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