This high school science fair project investigates if small changes in your diet alter the pH of your saliva.

How is NASA able to launch something into orbit around the Earth? Learn about the relationship between gravity, speed, and orbit in space in this cool project!

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

In this CD hovercraft science project, students will construct their own DIY hovercraft.

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

This science fair project idea quantifies exactly how accurate the cricket thermometer is.

This experiment evaluates whether motivational music can improve athletic performance.

In this experiment you will evaluate whether praise improves athletic performance.

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

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

Test your friends to find out if you can replicate the placebo effect's incredible results.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

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.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

Science fair project idea helps conceptualize probability. Compare probabilities and outcomes of cards drawn from a standard playing deck.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

The apparent movement of the sun has been used to keep time since the bronze age. In this science fair project, kids plot solar time against mean solar time.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

Examine whether males or females are more likely to have a higher center of gravity.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

In this science fair experiment about recycling, demonstrate how the wax from a candle can be reused to make another candle.

This conservation of energy demonstration shows why the first hill is the highest on a roller coaster. Learn more about potential and kinetic energy!

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.