This science fair project investigates why the number of visible stars changes from place to place.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

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?

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

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

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This project investigates the affect of storage temperature on microwave popcorn.

Find out whether putting something on top of a plant will inhibit its growth.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.