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

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.

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.

How many machines can you find around the house? You may find them where you least expect it!

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?

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?

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.

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.