In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.

Compare the amount of ozone in various locations with this science fair project that will have your kid create her own ozone strips!

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

Polymers remove oil from contaminated waters. The purpose of this science project is to test the effectiveness of a polymer in cleaning up an oil spill.

Science fair project that uses iodine solution to demonstrate how starch is turned into sugar when it is chewed in the mouth.

Determine which factors promote the greatest memory interference. Administer test, time how long it takes subjects to complete different tasks.

In this wind tunnel experiment, you'll make a wind tunnel to test lift and airflow on a model plane and explore aerodynamics and the Bernoulli Principle.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

In this fun science experiment, make a balloon car and test it on different surfaces to learn about sliding friction and rolling friction.

Examine how the tire treads of a bicycle affect its rolling frictional force. Change tires, test speed performance on different terrains.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

Get ready for a yummy taste test! Just pour the milk -- and make sure you have some chocolate chip cookies on hand.

Learn how to relight a candle by lighting the vaporized wax in the smoke, and test how various kind of wax and candle brands relight differently.

Are red apples really sweeter than green apples? The objective of this science fair project is to test the theory with quantitative evidence.

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Analytical chemists perform chromatography to separate colors into pigments. Test the food coloring used in M&M's and Skittles candy in this fun project!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

What kind of fabric holds dye best? How can you improve a dyed fabric's colorfastness? In this colorful project, test colorfastness using mordants and bleach.

Formulate a hypothesis and use the scientific method to determine the guess what is hidden in a box. Test abilities of volunteers, without opening box.

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.