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

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

This project examines whether more expensive golf balls translate into better results on the golf course.

This baseball science fair project explores the concept of an object's center of percussion to determine if the "sweet spot" has a scientific basis.

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

This science fair project idea produces varying pitches of sound.

Science fair project that determines what percentage of air is made up of oxygen by examining the chemical reaction between oxygen and rust.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Determine which metal has the highest rate of conductivity.

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 evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

This science fair project idea determines whether volunteers remember more information presented orally or visually or kinesthetically.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

Hold a magnet marathon! Explore the power of magnets with your kindergartener in this entertaining and simple science game.

Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Will male or female hair grow faster? Find out in this science fair project idea!

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

Demonstrate Newton's laws of motion by examining the relationship between mass, force, and acceleration during free-fall.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Plants and light seem to be good buddies, but how far does the friendship really go?

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

This science fair project idea investigates how the shape of an object affects drag.

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

Science fair project that demonstrates the different phases of the moon by physically representing them with construction paper and a shoebox

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.