Learn all about rivers--how they were formed, what they're made of, and what they do for us and the planet--in this reading and science worksheet.

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

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

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

What is the water cycle? We're glad you asked! Learn about this amazing natural system that's been working for billions of years.

Have you ever wondered what keeps the moon in orbit? Newton's first law gets a quick introduction, too, in this worksheet for kids. Check it out!

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

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

Learn about the many different biomes the Earth is home to in this life science worksheet, which holds the answers to some simple life science questions.

Discover how water flows in this informative environmental science worksheet!

Cells are the building blocks of all living things! Help your little scientist learn the basics of a cell with this fun activity.

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

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

Dive deep into your body's circulatory system with this worksheet on blood and what it's made of.

If you were a mad scientist, what modern-day version of Frankenstein's monster would you create?

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

What happens to water after it rains? Learn about the stages of the water cycle in this colorful worksheet!

Does your learner ever wonder what makes the Earth dark at night and bright during the day?

Ready for a truly electrifying lesson in science? Find out how electricity forms and what makes a lightning bolt!

Pheww! What is that stinky smell? This fun worksheet is jam-packed with fun facts, a word search and trivia, all about skunks!

Help your child practice her spelling and vocabulary with this fun worksheet! Discuss with your child what it means to be cold-blooded.

Learners will discover what heat waves are, and how they are connected to global warming, in this two-page earth sciences worksheet.

Do you know which animal has two humps? Your child will use clues to determine what animal name fits in the crossword puzzle with this worksheet.

This worksheet will quiz your child on the different fields of study in science. What's the difference between a zoologist and a geologist? Find out here!

Where'd that shadow come from? Next time a scary shadow crosses your path, you'll know just what to look for.

Ever wonder what's inside a camel's hump? Find out with this fun worksheet! It's jam-packed with facts about camels.

There are a lot of structures that make up a new plant, called a seedling. Your child will learn what they're called with this life science word search.

Searching for a worksheet to help your fourth grader with science? This printable will help him with geology.

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

Students practice classifying items as liquids or solids for a lesson on the states of matter in this fourth grade physical science worksheet.