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With this diagram, kids can find out more about oil, one of our most widely-used natural resources, and learn a little more about where it comes from.

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! 

Our silkworm facts help your little one understand more about these special invertebrates. He'll read about their life stages and answer some questions.

Fact: This worksheet is about unusual animals from all over the world. Opinion: This is the best fact and opinion worksheet ever!

Help your child learn about facts and opinions in this animal-themed worksheet! Students will read sentences and decide whether they express facts or opinions.

Help your child learn about facts and opinions. Kids will read statements about animals before determining whether each statement is a fact or opinion.

Is a feather liquid, soft, spotted, or heavy? Practice describing everyday objects, or matter, with this second-grade science worksheet!

Learn all about the cumulonimbus cloud, more commonly known by a much more fearsome name: the thundercloud!

What do juice, water, and tea have in common? Compare and contrast matter in this engaging second-grade worksheet!

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

Learn about the texture and hardness of different objects in this 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.