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

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

Where'd that shadow come from? Next time a scary shadow crosses your path, you'll know just what to look for.

Children learn the fascinating physics behind lightning, along with a few fun facts, in this physical science worksheet.

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

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!

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.

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

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

Explore the applications of electrical energy with this helpful second-grade worksheet!

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

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

A lot of common objects use electromagnets to work. This word search will get your child thinking about all the electrical and mechanical devices around her!

Review energy terminology with this fun fourth-grade crossword puzzle!

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

Who knew that the machines of the world are all made of just 6 simple machines working together? Introduce your child to simple machines with this worksheet.

Change up your regular classwork with this hands-on science worksheet!