Introduce children to physicist Albert Einstein — and a bit of theoretical physics — with this mini biography.

Did you know that sound is actually caused by movement? Vibrations of particles create the sound that we hear.

In this worksheet, kids learn about friction by answering questions about the amount of friction in different situations.

Discover the differences between gravity and magnetism in this forceful worksheet!

What is solar energy? Discover how we use the power of the sun, and complete this worksheet about an important renewable energy source.