Increase your child's vocabulary and knowledge of the scientific world around him with a single sheet!

What is the water cycle? We're glad you asked! Learn about this amazing natural system that's been working for billions of years.

This worksheet will quiz your child on the different fields of study in science. What's the difference between a zoologist and a geologist? Find out here!

It's a paper parachute brigade! Learn how to build your own parachute, and learn how the parachute was invented over 500 years ago.

Learn all about light refraction by simply placing your pencil in a glass of water. Warning: your pencil may not be quiet the same afterward.

Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Learn all about the science of the movies and the basic concepts behind how they work.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

A handy worksheet that breaks down the properties of metal. A good physical science review sheet to keep around for reference.

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

Students flex their physical science knowledge by classifying items as solids or liquids in this fourth grade states of matter worksheet.

Students practice classifying items as liquids or solids for a lesson on the states of matter in this fourth grade physical science worksheet.

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!

Apply concepts of energy and motion to marbles in this fourth-grade worksheet!

Unscramble key vocabulary words about energy and collisions with this engaging science worksheet!

Determine which magnets have the strongest force in this third- and fourth-grade worksheet!