Have you ever wondered why manhole covers are round? It's a good thing to know -- big companies sometimes ask that question in interviews.

Learn a bit about meteors, asteroids and comets as they travel across the night sky. Can your child round out the page by adding color to these orbiting rocks?

Go from a butterfly beginner to an expert with this worksheet, full of pretty butterflies and tons of information about where butterflies live.l

Use the clues in this crossword puzzle to fill in the blanks with different types of snake names. Learn interesting facts about snakes as you go!

Looking for a way to teach your kids all about the planets? This worksheet is the way to go. It features Venus, the second planet from the sun.

Learn about spider tortoises, one of the world's tiniest tortoise species, with this handy worksheet. Can't go to the zoo? We bring the zoo to you!

Can't go to the zoo? We bring the zoo to you! Check out the fulvous whistling duck, a bird with social skills and the willingness to share each other's nests.

Learn about the plants and animals that make deciduous forests their home, then complete the crossword puzzle.

What is the Earth made of? Find out everything that goes on just below the surface in this science reading worksheet.

Budding scientists can learn about an important physical science concept with this worksheet all about density!

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

For your budding environmentalist, here is an information sheet on a well-known endangered species, the Komodo dragon!

Looking for a worksheet to help your kid with his knowledge of human biology? This printable will help him with the digestive system.

If your child is studying life science, introduce her to all the strange animal pairs that work together in the wild.

Test your knowledge of prehistoric animals with this life sciences crossword puzzle!

Kids find forest animals in this third grade science word search. Animal habitat worksheets help students learn about life forms in different environments.

Kids find grassland animals in this third grade science word search. Animal habitat worksheets help students learn about life forms in different environments.

Peel back the layers of the earth in this earth science worksheet. Can you name all of them?

Did you know that Uranus can get as cold as -144° Fahrenheit? Learn more about the third largest planet in our solar system on this planet printable.

How far away is the Red Planet from the sun? Find out with this great Solar System printable.

Blast off deep into space with this science worksheet featuring the dwarf planet, Pluto.

Here's a great worksheet for teaching your kids all about the planet Mercury. Did you know that it's the smallest planet in our solar system?

Study the night sky with this hands-on science worksheet for third and fourth graders!

Put your kid's observational skills to the test with this word search that will help her learn some of the animals that inhabit a rainforest.

In which habitat could you find an arctic fox, a polar bear, and a snowy owl? Have your kid find tundra animals with this word search worksheet.

Learn about some of the major U.S. watersheds in this fascinating science and geography worksheet!