In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

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

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

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

This science fair project idea shows how a vibrating object transfers energy to whatever it touches.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

Get a cool and easy science fair project idea which helps high school students in understanding concepts behind the working of a microphone.

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

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.

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

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.