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3rd Grade Science Fair Projects

For their 3rd grade science projects, kids begin investigating the answers to their questions much like actual scientists would. Instead of simply collecting qualitative data (describing what they observe), 3rd graders graduate to collecting and presenting quantitative data by measuring their results with increased accuracy, communicating their findings in simple charts and graphs, and describing their observations in written prose. Education.com's collection of 3rd grade science fair projects give kids the opportunity to apply their newly acquired skills to thinking critically about the world around them while having serious fun in the process. Browse our collection of third grade science projects and experiments by using the boxes to the left to filter by topic and find an exciting science project your child will be sure to love.

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This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.
Third Grade
Physical Science
Will increasing the amount of salt in water effect how slow or fast the water freezes?
Third Grade
Chemistry
This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.
Third Grade
Chemistry
This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!
Third Grade
Physics
How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.
Third Grade
Chemistry
This science fair project idea explores whether white light can be separated into different colors.
Third Grade
Physical Science
This science fair project idea investigates how magnetism can defy the force of gravity.
Third Grade
Physical Science
How powerful is the reaction between baking soda and vinegar? Find out here!
Third Grade
Chemistry
In this science fair project, you'll make a 'ghost' appear in a test tube, and learn about what happens when hot water and cold water interact.
Third Grade
Physical Science
Crayons aren't just good for creating colorful masterpieces -- they're also great for science!
Third Grade
Chemistry

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