Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

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

This experiment explores the question of whether age and/or gender play a role in people's ability to remember dreams.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

This experiment explores the trend of reactivity in the alkaline earth metals as you go down the second column of the periodic table of elements.

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.

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

Learn about how we localize objects and beings in space through sound and about monaural auditory mechanisms and binaural auditory mechanisms.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

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

This science fair project idea investigates how magnetism can defy the force of gravity.

Science fair project that builds a magnetometer and demonstrate its uses.

This science fair project idea investigates whether rocks containing geodes can be determined from the outside.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea examines liquids of different densities.

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

This science fair project will investigate a type of sustainable development project.

This science fair project idea discovers the practical applications for the structural design of a snail shell.

This science project examines the thermal properties of several major greenhouse gases.

Science fair project that explores the natural process of limestone formation.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Science fair project that determines whether mass and weight are the same or different.

This super fun science project, perfect for young children, combines crafts, dressing up as animals, outdoor play, and life science learning.

This science fair project idea designs safe bicycle routes using GPS.