This science fair project idea investigates how different disinfectants work in killing germs.

This project is about after-images and what possibly affects them.

This science fair project idea determines whether volunteers remember more information presented orally or visually or kinesthetically.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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

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.

This science fair project idea produces varying pitches of sound.

Kids make an electromagnet in this electromagnetic induction experiment to learn about induction, current, and the right-hand rule.

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

Thermometers are how we measure temperature, and we've all heard the terms "centigrade" and "Fahrenheit" tossed around, but what do they really mean?

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

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

In this science fair project, students use the streak test to tell minerals apart from each other.

People have favorite flavors, but what about ants? Which ant food is the most popular?

This science fair project teaches students about wilting and browning of salad greens.

Explore the belief in astrology as a predictive system.

Slime mold is no longer classified as fungi! So what is it? In this cool science fair project, learn how to grow slime mold and explore its behavior.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Take a dive into the candy jar with this yummy science experiment.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Think about the adaptive utility of an important aspect of our physiology.

The purpose of this project is to determine if there are fluctuations in the rising and the setting of the sun and the position of the earth as it rotates.

In this project, you will observe and record changes in sunspots over two weeks.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Check out this cool and free middle school science fair project idea on how to make a solar oven.