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Children learn the fascinating physics behind lightning, along with a few fun facts, in this physical science worksheet.

Review energy terminology with this fun fourth-grade crossword puzzle!

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?

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

These 12 dinosaur names are all mixed up, and need a dinosaur expert to help unscramble the letters.

Open your ears for some interesting science! Your little biologist will learn the basic parts of the ear with this diagram.

Here's a great introduction to five famous astronomers for kids. See who got the star party started with this worksheet.

There are lots of stories around the world for the rabbit moon: a rabbit image seen in the shadows on the moon's face. Here's one for young moon-gazers!

Discover how cover crops enrich soil and support healthy crop growth with this research-based worksheet for fourth and fifth graders!

An energy pyramid is a simple way to graphically show how energy flows in an ecological community; somewhat similar to the food pyramid.

Do you know the functions of the primary organs in the human body? Put your knowledge to the test with this fourth- and fifth-grade crossword!

Which comes first, genus or phylum? To complete this life science crossword, kids need to put the 9 levels of biological classification in the correct order.

Introduce children to photosynthesis with this fill-in-the-blanks life sciences worksheet!

Learn how energy changes forms with this fourth- and fifth-grade physical science worksheet!

Budding biologists can learn all about human digestion with this information page, complete with a diagram of the digestive system.

Expand your sea creature vocabulary with this Life in the Reef worksheet!

Flex your mind muscles with a body science worksheet! Your child will learn the fundamentals of what makes up our muscles.

What happens to our food after we swallow it? Chomp on some body science with this diagram of the digestive system.

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

Sink or float? Your kid may be surprised to learn that the density of coke and diet coke aren't the same!

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

Learn how conductors and insulators affect the flow of electricity in this helpful fourth- and fifth-grade worksheet!

What is solar energy? Discover how we use the power of the sun, and complete this worksheet about an important renewable energy source.

Learn all about essential laboratory equipment with this hands-on worksheet for fourth and fifth graders!

Get charged up about static electricity with this informative fourth- and fifth-grade worksheet!

Discover the details of desert plant life in this informative worksheet!

Discover Earth’s different spheres with this fourth- and fifth-grade earth science activity!