Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Test whether plants can grow without sunlight and water.

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

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

This science fair project idea demonstrates that plants give off water.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Explore if planting seeds in a certain direction will affect how fast it germinates.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

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

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.