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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.

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

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

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.

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

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

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

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

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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.

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

This science fair project idea produces varying pitches of sound.

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

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

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.

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

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

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

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

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.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

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.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.