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.

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

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

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

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.