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Get a cool middle school chemistry project idea on how to determine whether a physical or a chemical change has taken place.

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

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.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

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 creates a sedimentary rock and to investigate what takes place during the rock cycle.

Research and understand basic computer science. Build a simple computer, following instructions found online. Design a new or improved feature.

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

If you hold a fire up to a balloon, it pops instantly. What if you could prevent this from happening? In this project, we do just that.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Science fair project that demonstrates how a rainbow forms, by using water to split white light into its many colors.

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?

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Examine how a battery can be made from everyday materials.

Make a backbone model to explore human anatomy and life science.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Learn about what happens to a current-carrying wire in a magnetic field in this cool electromagnetism experiment!

This science fair project idea determines the probability of a coin landing heads or tails.

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 experiment will explore whether fractals really repeat themselves infinitely.

A project to reinforce learning about the layers of the rainforest, rain forest ecosystem, and the greenhouse effect.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Research history of programming language. Design a new or improved programming language. Create a display that illustrates the features and improvements.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

The objective of this science project is to determine whether a sweet tooth is most likely an inherited trait or a learned behavior.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.