This biodiversity project examines the biodiversity in your own backyard.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Start your toy engines -- this is going to be a fast and friction-filled race!

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

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.

This science fair project idea compares biodiversity between drops of water.

Is it a square or a circle? See if you can trick your friends with this zany science project!

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This science fair project idea determines if material and tensile strength of different types of skateboard wheels affects the velocity of the skateboarder.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

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

The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

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.

Measure the speed of the earth's rotation using protractors and meter sticks. This science fair project measures the angle of the sun in relation to earth.

This science fair project explores different types of endangered frogs, and why some are endangered while others are not.

Check out this fun science project idea to explore different types of starches and learn how removing starch affects the quality and taste of food.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

The objective of this science fair project idea is to determine whether frozen vegetables have more nutrients than canned vegetables.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

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.

This science fair project idea tests the efficiency of short term memory.

How can Hooke's law explain how springs work? Learn about how Hooke's law is at work when you exert force on a spring in this cool science project.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.