Pigs, cows, and ducks, oh my! The clues in this animal crossword puzzle worksheet will help you remember what animals there are on a farm.

How can you tell how old a tree is? Look no further! This worksheet gives a basic overview of tree rings for your little scientist.

Learn the names of major joints in the human body, the points at which bones intersect to make your arms and legs bend.

Meet the altostratus cloud, a thin cloud that sometimes makes rain, in this earth sceince worksheet.

Teach your child how we measure temperature with these printable thermometers!

Filling out this spider diagram will be much less scary than running into these creepy crawlers in real life. Fill in the body parts from the work bank.

How does our hearing work? Give your child a great guide to the anatomy of our ears with this anatomy worksheet.

All living things go through many changes as they grow to be adults! Help your little one understand how he will grow and change.

Is air a natural resource? You bet! Air as a resource carries oxygen, which we need. Read and write about ways air quality can be affected.

Ecosystems are an important part of fourth grade science. This fun printable will help your child with her knowledge of plants and animals.

That's not a lake... it's a crater! Get the scoop on some of the world's most well known craters with this space science worksheet.

Meet Michael Faraday, the inventor of the first electric motor. Without Faraday, who knows if we would even have working cars, airplanes or even clocks!

This worksheet helps kids understand variations in animals and how the same kind, or species, can sometimes look different from each other.

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

Learn about the "dwarf planet" in our solar neighborhood. There are more Pluto facts to learn, if you figure out the answer to the question on the page.

Before trees grow into trees, they start out as little seeds. Can your child match the fruit and seeds with the trees (or plants) they came from?

This experiment requires only lemon juice, salt, sugar and grapefruit. Your budding scientist can get a great introduction to science by testing her own tongue!

Did you know that one of the main ingredients of a perfect pearl is dust? Learn all about the bizarre process behind every pearl with this science worksheet.

Test your little nature-lover's knowledge about our feathery friends. Can she figure out which bird fits each description?

Take a quick lesson in the otters that inhabit Yellowstone National Park and take an even quicker quiz.

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.

Grandma and grandpa didn't always have gray hair. Find out about what gives our hair color and what makes our hair lose that color as we get older.

Launch into learning with this worksheet on Gemini 4, one of the original missions in the early days of the U.S.'s space program.

A natural resource is something that we use that occurs naturally in the environment. Teach your child about the densest and heaviest natural resource: rocks!

Calling all mad scientists... Electrify your enthusiasm for science! This awesome worksheet will show you step-by-step how to make an electromagnet.

Discover the many different kinds of conifer and deciduous trees as you complete this word search!

Meet the stratocumulus cloud, the kind of cloud that tend to gather in groups when a storm is on the way.

Looking for a fourth grade worksheet to help your kid with astronomy? This printable will help him learn the relative sizes of planets.

Use the clues in this crossword puzzle to fill in the blanks with different types of snake names. Learn interesting facts about snakes as you go!

Help your child understand why it's so important to take care of the environment with this info-sheet about an endangered species: the spectacled bear.