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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! 

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.

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

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

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

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

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

Find out more about what REALLY dwells in swamp ecosystems with this worksheet all about swamps.

Learn more about a tide pool habitat with this life science worksheet for second and third graders!

This worksheet teaches your child about physical properties of water, specific heat, kinetic energy and more.

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

Learn more about two kinds of aquatic biomesÃfreshwater and saltwater biomesÃand how you can tell them apart.

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

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

Learn more about what lives--and what thrives--in marshes with this fill-in-the-blank worksheet on marsh ecosystems.

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.

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

Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

These clever birds harden and disguise themselves as tree branches when threatened. Learn more and do some coloring with this worksheet.

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

Did you know that 763 Earths could fit inside Saturn? Learn more fun facts about Saturn on this fun science printable.

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

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

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

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

Without reflective surfaces, this biker would have a much more dangerous ride. Can you find all five reflective surfaces present in this scene?

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

Did you know chameleons can sleep upside-down? Learn more about chameleons with this fun worksheet, jam-packed with fun facts and activities!