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 fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Make a backbone model to explore human anatomy and life science.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

This science fair project idea explores the egg's thin membrane.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

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

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science project allows students to study the psychology of happiness.

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

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

This science fair idea is a great way for kids to explore static electricity. Kids will give a comb a static charge and watch as it separates pepper from salt.

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!

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This science fair project idea investigates how color affects temperature.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This project explores ways to prevent static electrical shocks.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.