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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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Showing 91 to 105 of 108
Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.
Middle School
Medium
How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.
Second Grade
Easy
This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.
Third Grade
Fourth Grade
In this experiment we use Scotch Guard to make sand that resists water.
Middle School
Seventh Grade
Have fun with bubbles and find out why there are bubbles in your tap water in this cool science fair project idea.
Elementary School
Easy
Free science fair project idea examining how different types of water affect plant germination and growth.
Middle School
Earth & Space Science
A compass is a useful navigational instrument for determining direction relative to the Earth's magnetic poles. Learn how to use one in this science project!
Elementary School
Physics
In this free science fair project idea, we learn about fronts and how they move about and affect the weather.
Middle School
Earth & Space Science
A hydrometer is an instrument used to compare the density (mass per unit volume) of a liquid substance to the density of pure water. Learn how to make one!
Middle School
Easy
In this free science fair project idea, we demonstrate and analyze the effects of erosion on crustal material.
Middle School
Earth & Space Science
What color do you get when you mix red and green colors? It could be yellow or brown depending on the process.  Do the free science fair project to find out.
Middle School
Easy

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