Do you know the functions of the primary organs in the human body? Put your knowledge to the test with this fourth- and fifth-grade crossword!

This worksheet tests kids' understanding of basic heredity by asking them to match parent turtles with their offspring based on similar traits.

Fill in the blanks from the words listed in the word bank, then keep this sheet handy to prepare for tests and quizzes on life science and photosythesis.

After he fills in the blanks, your student can hold on to this worksheet on hydrogen for reference when preparing for tests and quizzes on physical science.

Is your fourth grader learning about electricity? This worksheet is all about circuits, tests her skills and reinforces the concept of how a circuit works!

How cool are chromosomes? Read what Steve the savvy scientist has to say about chromosomes and genes before testing your knowledge with some fill-in-the-blanks.

This worksheet features a scientific explanation and awesome photos of solar eclipses, which are extremely rare scientific phenomena.

Looking for a worksheet to help your kid with science? This printable will help him with his knowledge of geology.

Learn about the badgers that live in Yellowstone National Park.

Read about the mule deer, the most abundant deer in Yellowstone National Park.

Does your budding biologist know his plant parts? Get a great review of some important plant vocabulary with this info page.

Invite spellers on an inter-stellar adventure with this fun word scramble puzzle.

How much do you know about our home planet? Boost your Earth knowledge with this science printable.

What is the purpose of a narwhal tusk? Explore some interesting new findings about the narwhal, also known as the unicorn whale.

If Dorothy had lived a little further south, she might have been swept away to Oz by a hurricane.

Jump-start your kid's excitement about kangaroos! Together, you can learn some cool kangaroo facts, like how kangaroos can jump up to 30 feet.

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

Dragonflies are some of the oddest looking insects in the world, so it's appropriate that they have so many unique characteristics. Read all about them!

Do you know why Mars is called the Red Planet? Find out that and more on this planet printable.

How much do you know about our solar system's planets? Kids learn facts about Neptune in an out-of-this-world worksheet.

Get to know Earth's star with with this diagram and vocabulary worksheet!

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.

Blast off into space with a fun planet printable. This one features Jupiter, the largest planet in our solar system.

Children label the eight planets of our Solar System in this simple astronomy worksheet.

You have over 600 muscles in your body! Kids can try this muscle anatomy word search featuring 14 important muscles.

Children will connect their understanding of gases to real-world items as they circle all of the pictures showing gases.

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

During the Gold Rush, people weren't sure if they found gold or something else, and these easy steps would help them be sure.

Learn how conductors and insulators affect the flow of electricity in this helpful fourth- and fifth-grade worksheet!

Here's a great way to teach your kids more about our solar system. This worksheet focuses on the dwarf planet, Pluto.