What has two legs and carries its baby in a pouch? Fill in this crossword puzzle and learn some fun facts about two-legged creatures!

Investigate the mystery of why two tomato plants developed so differently!

This is the story of our solar system. Learn about the life of Nicolaus Copurnicas and his great discovery. Learn more by answering the question at the bottom.

Life on Earth is vast and varied, from high in the sky to the bottom of the sea. Learn more about what lives on Earth with this reading and quiz worksheet.

Dive into the electrifying concept of electrical energy in this colorful worksheet!

Practice classifying different animals in this engaging life science worksheet, created for second and third graders!

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

Who will win the marble race in this two-page physical science worksheet?

Use this cool 2-page worksheet to make your own big dipper clock!

Match forms of energy to common examples in this third- and fourth-grade science worksheet!

Explore the strength of magnetic forces with this worksheet for third and fourth graders!

In this worksheet, children practice identifying animals of North America by their tracks.

Learn to identify and name the parts of a seed in this two-page science worksheet and quiz!

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.

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

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.

Uncover secrets of the past with this third-grade worksheet about fossils!

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.

Find out the the cool science behind ice cubes with this fun worksheet.

Discover some fun facts about the sun — and bring it to life with color — with this astronomy worksheet!

Without light sources, we wouldn't have any light. Can you imagine a world without any light sources?

This reading comprehension worksheet focuses on Brazil's incredible natural resources, targeting both Earth science and language arts.

Discover the importance of butterflies in pollination with this informative worksheet!

Identify the life cycle of a butterfly with this hands-on worksheet for second and third graders!

Consider the factors that affect magnetic forces in this informative third- and fourth-grade worksheet!

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

Determine which magnets have the strongest force in this third- and fourth-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.

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!