Take a plunge under the surface of the earth! With this worksheet as your guide, you may explore the geological processes of our planet.

Take a quick lesson in the otters that inhabit Yellowstone National Park and take an even quicker quiz.

Here's a quick overview of drought and flooding to spark thoughts or conversation with your kids about water.

Looking for a quick reference about gravity and a definition for kids? This two page worksheet and activity has you covered!

Have you ever wondered what keeps the moon in orbit? Newton's first law gets a quick introduction, too, in this worksheet for kids. Check it out!

Here's a thorough, easy-to-understand breakdown of the color wheel that includes primary, secondary and tertiary colors.

This worksheet is a quick-reference tool of space vocabulary for kids, with an exercise to use the words properly in provided sentences.

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

One of the most famous and easy to spot constellations is the Big Dipper! Formally known as Ursa Major, this constellation was named after a bear.

It's easy being green when you have our Earth Day game for a guide. Just print out this Earth Day game and get ready to score one for the planet.

Discover the impact of water on Earth’s landscape with this fourth-grade erosion worksheet!

Light travels so quickly that sometimes we can forget it even travels at all. Learn all about the direction light travels and perform your own experiment!

Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

Did you know that the screw is actually one of the six simple machines? This handy machine helps to make work easier!

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

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

Get a light lesson in the darkest of creatures, the raven.

What is water energy? Also known as hydro power, water energy is one of our important renewable resources!

Budding biologists can learn all about human digestion with this information page, complete with a diagram of the digestive system.

Learn about the amphibians and reptiles of Yellowstone National Park.

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

Learn about pearls, which seem like normal jewelry from a factory but are actually made from the mucus of mollusks!

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

This helpful worksheet lays out all the qualifications for planethood. A great way to start studying outer space science!

Help kids understand the size and scope of billions of years with this helpful reference worksheet.

Introduce children to photosynthesis with this fill-in-the-blanks life sciences worksheet!

Learn to identify and name the parts of a seed in this two-page science worksheet and quiz!

What's your favorite animal? Kids love answering that question, and with this animal research graphic organizer, they can write all about it.