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

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

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

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.

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

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.

This science fair project idea produces varying pitches of sound.

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

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

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.

This science fair project idea demonstrates sonar mapping of the ocean floor.

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

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.

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.

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

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.

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?

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

.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.

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

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

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

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

Find out whether matching resonant frequencies can cause objects to shatter.

In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

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.