Milky Way: candy bar or galaxy of 100 to 400 billion stars?

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!

Are chickens mammals, fish, or birds? Sort animals by their traits in this informative life science worksheet!

Ready for liftoff? Take to the starry skies with this worksheet that explores the three basic types of galaxies.

Connect forms of energy to real-life scenarios in this third- and fourth-grade worksheet!

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

Identify the appearance of the moon during its three main phases which include the New Moon, Quarter Moon, and Full Moon.

This is not your average coloring page. Using only the three primary colors, mix your paints together to form as many colors as possible.

Consider the factors that affect magnetic forces in this informative third- and fourth-grade worksheet!

What is a plateau? What's the difference between a butte and a mesa? Look at these three land forms and learn to tell them apart with this worksheet.

Are cats trying to talk to us when they purr? Discover the meaning behind the purr in this worksheet that explores the three main types of cat purrs.

Look up into the night sky, and you may see three prominent stars side by side. This is Orion's belt, one of the most well known constellations!

How do the Sun and the Moon interact with the Earth, and how do all three depend on one another? Find out in this science worksheet.

Unearth fossils in this explorative third-grade worksheet!

Help third and fourth graders become rock stars with this informative geology worksheet!

Explore the applications of electrical energy with this helpful second-grade worksheet!

Dive into the electrifying concept of electrical energy in this colorful worksheet!

Match forms of energy to common examples in this third- and fourth-grade science worksheet!

Explore the strength of magnetic forces with this worksheet for third and fourth graders!

Determine which magnets have the strongest force in this third- and fourth-grade worksheet!

Discover different types of energy with this third- and fourth-grade science worksheet!

Learn about the Uinta ground squirrels of Yellowstone National Park.

Introduce children to physicist Albert Einstein — and a bit of theoretical physics — with this mini biography.

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

Learn to read a standard thermometer in both Fahrenheit and Celsius in this informative second- and third-grade worksheet! 

Learners will get to know the bald eagle, the national bird of the United States and an inhabitant of Yellowstone National Park.

Space enthusiasts will love learning about Freedom 7, the first manned American space mission.

Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

Explore grasslands and their fauna in this thought-provoking worksheet!

Learners will discover a simple overview of the human muscle system in this introductory worksheet.