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.

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

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 project examines the history of earthquakes and what we can do to prevent future disasters.

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

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

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

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

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