Earth has many different land and water features—can you recognize them? Test your knowledge with this crossword puzzle for third and fourth graders!

Read about one of Yellowstone National Park's coolest animals, the big horn sheep.

Learn about Red River Hogs in this series of animals facts sheets and coloring pages in one.

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!

These "Dig It!" worksheets not only teach about life on earth, they teach the scientific method as well.

Did you know the surface of the Earth is always changing? Learn about the events that change Earth's surface with this crossword puzzle for second and third graders!

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

Pull the lever on learning! Get to know one of the six simple machines with this worksheet about the lever.

Practice naming the planets in our solar system with a fun, visual worksheet! Your child can see the planets in their orbits and try to label each one.

The narwhal is one unusual animal! Your child will learn about this horned sea creature through text and pictures.

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

Scorpio, the scorpion, is one of the zodiac signs but you can also find him up in the stars at night!

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

Whoa, this spider is quite the spinster! He is actually one of many brand new species discovered between 2009 and 2011.

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

Give your child a great coloring page full of fun flower facts! This one is about the iris flower and the butterfly.

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

Did you know that an elevator is actually one of the six simple machines? Help your child understand how the pulley works.

Walter's Duiker is a new species of duiker, a kind of antelope, and one of many new species discovered between 2009 and 2011.

Launch into learning with this worksheet on Gemini 4, one of the original missions in the early days of the U.S.'s space program.