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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?

Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

Fudge is one of very few desserts people make at home that is actually crystalline. What happens when the fudge crystallizes at different temperatures?

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

This project explores whether there is an effect on people, including heart rate and self-expressed mood, when they are exposed to different types of music.

Study how liquids separate into layers by creating a liquid gradient, different density liquids separate into layers in a graduated cylinder.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

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?

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Examine how the tire treads of a bicycle affect its rolling frictional force. Change tires, test speed performance on different terrains.

Culverts transport seeds away from their original location to different places. This science project examines the effect of culverts on plant growth in streams.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

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

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Explore this fun science fair project idea to investigate different microclimates in and around your home and their effects on the plant and animal life.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Determine the efficiency of multi-tasking by comparing how long it takes students to complete different tasks. Collate data, complete Summary Chart.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

Determine which factors promote the greatest memory interference. Administer test, time how long it takes subjects to complete different tasks.