Did you know plants make their own food? Discover how with this fill-in-the-blank worksheet for third and fourth graders!

Test your third grader's biology knowledge with this worksheet, which challenges him to separate invertebrates from animals with a backbone.

Third grader today, astrophysicist tomorrow! Let your child research their planet of choice, and discover everything from the number of moons to temperature.

Never heard of the planet Pirjute? That's because it's Jupiter, with mixed-up letters! Kids unscramble planet names on this third grade science worksheet.

Kids find forest animals in this third grade science word search. Animal habitat worksheets help students learn about life forms in different environments.

Kids find grassland animals in this third grade science word search. Animal habitat worksheets help students learn about life forms in different environments.

The animal names on this third grade science and spelling worksheet are all mixed up! Kids unscramble reptile and bird names to complete the worksheet.

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

Our ecosystems need a protector; is your third grader up to the challenge? Identify harmful pollutants in a science worksheet that doubles as a coloring page.

What is the purpose of a hard shell or a long neck? Discover different adaptations with this matching worksheet for second and third graders!

Without rain, we wouldn't have any puddles to splash and stomp in. Does your third grader know why and how rain falls from the clouds?

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

Did you know that Uranus can get as cold as -144° Fahrenheit? Learn more about the third largest planet in our solar system on this planet printable.

Earth has many different land and water features—can you recognize them? Test your knowledge with this crossword puzzle for third and fourth graders!

Looking for a quick reference about gravity and a definition for kids? This two page worksheet and activity has you covered!

Fly high with The Wright Brothers, two siblings who soared to the forefront of history with their design for the first modern airplane.

Have you ever wondered why giraffes have long necks or why lions have sharp teeth? Find the answers in this third- and fourth-grade worksheet about adaptations!

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! 

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

Did you know the surface of the Earth is always changing? Learn about the events that change Earth's surface with this crossword puzzle for second and third graders!

Cave formations come in all kinds of shapes and sizes; get the scoop on common cave formations with this two page printout with a maze and vocabulary.

Let your kid's knowledge of leaf vocabulary climb as high as a tall, tall tree with this fun word search.

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.

These are the largest tortoises in the world, yet they are only two inches long when they hatch! That's one of the facts you can learn from this worksheet.

Think toads and frogs are the same? Think again! Check out this breakdown of the differences between the two, complete with a quiz to check your new knowledge.

This solar system worksheet guides your child through the order of the planets. Use this solar system worksheet to learn about the planets in the Milky Way.

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

Are chickens mammals, fish, or birds? Sort animals by their traits in this informative life science worksheet!

Some people think alligators and crocodiles are the same, but there are some distinct differences. Check out this cool worksheet to learn what they are.

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