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Third Grade Science Fair Project Ideas

Great selection of third grade science fair project ideas. These science fair projects can help you find third grade level ideas for your science fair.

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This science fair project will help students learn about non-vascular plants, such as mosses.
Water and Mosses
Third Grade
Second Grade
In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.
When Seeds Explode
Third Grade
Elementary School
This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.
The Role of Fat in Food
Third Grade
Elementary School
The objective of this science fair project is to find out how much fat is in potato chips.
How Greasy are Your Potato Chips?
Third Grade
Elementary School
Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.
Understanding Absorption
Third Grade
Easy
This science fair project idea investigates how magnetism can defy the force of gravity.
Defying Gravity
Third Grade
Elementary School
The purpose of this science fair project is to investigate how salt concentration affects the rate at which brine shrimp eggs hatch.
How Does a Salt Concentration Affect the Hatching of Brine Shrimp Eggs?
Third Grade
Elementary School
The purpose of this science fair project is to investigate how the caffeine in soda drinks impacts the human heart rate.
Caffeine and Heart Rate
Third Grade
Kindergarten
This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.
The Mohs Test: How to Compare the Hardness of Minerals
Third Grade
Elementary School
This science fair project examines the biodiversity in your own backyard.
Backyard Biodiversity
Third Grade
Elementary School
The purpose of this science fair project is to determine the strength of a magnet based on the distance it moves a magnetic toy car.
Can a Toy Car Reveal the Strength of a Magnet?
Third Grade
Elementary School
In this science fair project, students discover how sedimentary layers form as sediments like mud silt and sand settle over time.
How do Sedimentary Layers Form?
Third Grade
Elementary School
This science fair project explores how osmotic pressure forces water through the root up into the plant.
How Does Water Travel Up the Root of a Plant?
Third Grade
Elementary School
What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.
What Causes Dilated Pupils?
Third Grade
Anatomy
The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.
Color and Heat Absorption
Third Grade
Elementary School

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