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

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

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Students flex their physical science knowledge by classifying items as solids or liquids in this fourth grade states of matter worksheet.

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

Use a seesaw to see what happens when opposing forces become balanced or unbalanced!

In this North American animal tracks worksheet, students hone their observation skills by matching tracks to animals.

Learn about the science behind one of nature's most awesome spectacles: monsoons.

Learn the ins and outs of one of the body's most important organs: the heart!

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

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

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

Learn about some of the most common forms of energy with this helpful one-pager for third graders!

Don't let your kid bark up the wrong tree! Engage him in a word search filled with tree terms, boosting his attention to detail and problem solving skills.

Dig into the past with this third-grade worksheet all about fossils!

Do you measure distance in inches or seconds? When do you use miles? Answer these and more with this third-grade worksheet about the customary system of measurement! 

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

Learn Saturn facts with this science printable, like that it is one of the large gas planets in our solar system!

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!

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

Introduce your child to a fascinating new animal, the Baird's tapir. This is just one of many endangered species around the world.

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.

Get to know some of the friendly, furry, feathery river wildlife that live near American rivers, then match each one to its home.

Bikes are a healthy, great way to get from one place to another! Use this bike chart to familiarize yourself with basic bike parts.

Coyotes' famous howl gave them the nickname "song dogs." This is just one of several coyote facts your child can learn from this worksheet.

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.

Before we knew what the stars were, people would often tell stories about the pictures that the stars formed. This one is called Aquila, the eagle!

All the animals in this word search share one characteristic: none of them have bones! Can your child find the boneless critters hidden in the puzzle?

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.