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Elementary School Science Fair Project Ideas

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

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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
Check out this cool science project idea to explore the differences in feeding behaviors of birds and if other species of birds also have color preferences.
What Colors are Birds Attracted to?
Elementary School
Middle School
The purpose of this science fair project is to investigate why honey crystallizes and what may make honey crystallize faster.
Why Does Honey Crystallize?
First Grade
Second Grade
This science fair project idea determines if family members can recognize one another using only the sense of smell.
How Good is Your Sense of Smell?
Elementary School
Fifth Grade
This science fair project idea produces varying pitches of sound.
Changing the Pitch of Sound
Elementary School
Fourth Grade
Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.
Too Much Sodium?
Third Grade
Easy
The objective of this science fair project is to find out how much fat is in potato chips.
How Greasy are Your Potato Chips?
Elementary School
First Grade
This science fair project idea determines which method of hand cleansing is the most effective.
Effective Hand Washing
Elementary School
First Grade
This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.
Which Type Of Rocks Are Most Damaged By Freezing?
Elementary School
Fifth Grade
This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.
Greenhouse Project
Third Grade
Fourth Grade
In this free science fair project idea, we wind a rubber band in a machine, and watch it transform potential energy into kinetic energy.
Spool-Racer: How Can a Rubber Band Transform (Change From one Form to Another) Energy?
Elementary School
Engineering
Attraction? Detraction? The goal of this science fair project is to explore how magnetic fields differ.
How Do Magnetic Fields Differ?
Elementary School
First Grade
This science fair project idea explores
Goldfish Behavior
Elementary School
Fourth Grade
This fun middle school science fair project idea explores the process of respiration and determines whether boys and girls have the same lung capacity.
Breathe in! Breathe Out! Do Boys and Girls Have the Same Lung Capacity?
Elementary School
Easy
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?
Elementary School
Third Grade

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