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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 76 to 90 of 105
Science fair project about different digital image file types, compares different encoding algorithms used to compress the data.
Eighth Grade
Ninth Grade
Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.
Third Grade
Fourth Grade
Science fair project which determines whether the depth of a boat in the water changes how fast it moves and how straight it sails.
Fifth Grade
Sixth Grade
In this free science fair project, explore the unique characteristics and distinctive behaviors of reptiles.  A great project for middle school students.
Middle School
Easy
Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.
Middle School
Hard
In this free science fair project, learn how to grow algae and explore the behavior of algae.  A great science project for middle school students.
Middle School
Easy
Examine the influence of the phase of the moon on moisture capillarity in garden soil. Measure and record the depth at which water is first detected.
Middle School
Hard
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
The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.
Ninth Grade
Medium

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