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.

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.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

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

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?

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.

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

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.

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

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

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

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

Design a hearing protection device to protect their ears from loud noises. Examine the properties of current protective hearing devices, materials.

This experiment investigates whether there are certain sounds that affect men and women differently