In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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.

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.

Learn about the right-hand rule for magnetic force! Use a cathode ray tube in this physics experiment to see a magnetic field's effect on an electron beam.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked.

This science fair project idea uses the process of chemical weathering to change a mineral.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

This science project researches the correlation between barometric pressure and wind velocity.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

This experiment will explore if a randomly iterated algorithm will result in a pattern.

This project examines how temperature affects the volume of gas in balloons.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

In this experiment, you will be making your own paper flashlight by conducting electricty with graphite.

This project examines whether corked bats truly make a ball travel farther than wooden bats that haven't been altered.

Science fair project that illustrates the properties of black holes in space.

2011 VIRTUAL SCIENCE FAIR ENTRY: The objective of this science fair project is to develop a microcontroller and circuit that can conduct electricity.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

In this project, you'll create Oersted's experiment, which relates to how electric currents create magnetic fields.

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

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

In this project students experiment with making music using only glasses of water.

This science fair project idea explores which kinds of earplugs are the most effective.

This project will examine the relationship between materials and air resistance.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

This project uses toy cars to determine how friction and gravity affect cars and braking.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!