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

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

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

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 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.

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

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

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 idea explores whether talking to a plant will help it grow.

This science fair project idea produces varying pitches of sound.

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.