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!

It's a bird! It's a plane! It's Physics Man! Test your knowledge of the physical world with this fun questionnaire that takes physics to a super-heroic level.

Have you considered why elephants have trunks, or why polar bears have thick fur? Reflect on animal adaptations with this fourth-grade 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!

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

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

Is your child baffled by the scientific method? Dr. McSquare is here to help! Learn the steps by helping the doctor organize his lab reports.

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

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

What's your favorite animal? Kids love answering that question, and with this animal research graphic organizer, they can write all about it.

Let your child put her thinking cap on and take a moment to write about the influence people might have had on the formation of landforms.

Encourage your child to take a nature walk, using the prompts on this worksheet to write and draw their observations of plants, animals, sounds, and more.

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.

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

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.