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

This science fair project idea explores what common compounds can be easily separated out in a centrifuge.

Demonstrate the capillary function in plants by adding food coloring to glasses of water. Slice stalks of celery and leafy tops. Compare color of leaves

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

This science fair project idea investigates how images are influenced by changes in light.

Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

A fun, life science sxperiment idea idea involving strategies for keeping birds away from crops using a distress call. What kind of distress call works best?

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

Determine whether carpet placed on a lawn will kill grass and weeds. Choose an area of lawn that you would like to remove, record grass that is dead or dying.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This science fair project studies whether DSLR and Point-and-Shoot cameras work the same way under all conditions.

This science fair project idea determines whether the older population prefers darker, duller colors rather than bright and lush colors.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This project explores differences in people's reactions to images in color and images in black and white.

This science fair project idea explores how water and ice can change the form of rocks.

Tin can phones offer something modern versions don't—a fun project to make with a friend, and a dramatic illustration of vibration and sound waves.

Can you win a staring contest? Would your performance be influenced by your eyesight? Find out in this science fair project idea!

This science fair project idea explores the egg's thin membrane.

This project investigates whether chewing gum can help a majority of people with focus and concentration.

This science experiment has students test whether a snail moves faster on concrete or dirt.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

Examine the effect of pressure on carbonation in soda.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This cool middle school science fair project idea helps students explore the role phototropism plays in the growth of green plants.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.