Have you considered why elephants have trunks, or why polar bears have thick fur? Reflect on animal adaptations with this fourth-grade worksheet!

Have you ever wondered why giraffes have long necks or why lions have sharp teeth? Find the answers in this third- and fourth-grade worksheet about adaptations!

Glass is everywhere, but have you ever wondered where it all came from? It doesn't grow anywhere -- we have to make it!

Why do some desert animals have large ears? Why do others have scales? Learn the answers to these questions and more with this life science worksheet!

Have fun learning about food chains in this charming science worksheet!

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

Does your child have a knack for astronomy? Teach him about the constellations with this great worksheet.

If you know what each planet looks like, you'll have no trouble with this intergalactic crossword puzzle.

Even colors have best friends. In the world of color, these best friend pairings are called complimentary colors.

Stretch your backbones and learn about the creatures that have a spine and those you don't!

Ever wonder why zebras have so many stripes? Find out with this fun worksheet all about the zebra!

Be a busy bee as you learn all about the different jobs honey bees have in their hives!

Without light sources, we wouldn't have any light. Can you imagine a world without any light sources?

Rainbows look like swipes of brightly colored paint hanging in the sky. Have you ever wondered how they got there?

Find out everything you need to know about lightning rods! These metal poles have quite a special relationship with lightning.

Many legends told by ancient people have characters that you can find as star formations called constellations! This one is Andromeda.

Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.