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Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Determines the extent that high school GPA predicts future income. Survey volunteers, divide GPA into 5 categories, compare income levels with GPA

Research long-term effects and draft a questionnaire about frequency of marijuana use and average annual income. Interpret findings in a detailed report

Plant sunflower seeds , measure height, calculate average height, compare size and weight of heads. Interpret findings in detailed report.

Create groups of volunteers based on frequency of playing video games. Compare driving records. Analyze data, interpret findings.

Research active ingredients in anti-aging creams. Test skin creams on volunteers, document the effectiveness of the creams with before an after photographs.

Determine how effective animal camouflage is by simulating it in an indoor and outdoor setting.

Challenge your learner to design and build a city of their own in this creative engineering activity.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

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.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

The purpose of this science project is to determine which stimulus, gravity or water, will cause the greatest growth response in a plant.

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

Learn the anatomical and physiological differences between central and peripheral visual systems.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Your kindergartener will make prints of his favorite fruits and vegetables and learn how to organize and assemble his very own book.

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.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project idea studies how talking on a cell phone affect driving?