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

This science fair project idea produces varying pitches of sound.

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

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

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

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

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

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

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

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.

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.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

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

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.

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

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

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.

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.

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.

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.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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

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

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.

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

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

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

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.