1st - 5th Grade Physical Science Science Projects

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This science fair project idea experiments with spinning color wheels and optical illusions.

This science fair project idea explores whether talking to a plant will help it grow.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

This classic children's game demonstrates how sound travels through air vs. through a solid.

This science fair project idea produces varying pitches of sound.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This science fair project idea produces sounds by creating vibrations using different objects.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

The purpose of this science fair project is to build a basic radio.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

How powerful is the reaction between baking soda and vinegar? Find out here!

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.