Have you ever wondered why manhole covers are round? It's a good thing to know -- big companies sometimes ask that question in interviews.

Glass is everywhere, but have you ever wondered where it all came from? It doesn't grow anywhere -- we have to make it!

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.

Children will learn important facts about food chains in these worksheets.

Draw the phases of the moon in this earth sciences worksheet!

Identify the appearance of the moon during its three main phases which include the New Moon, Quarter Moon, and Full Moon.

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.

Children label the eight planets of our Solar System in this simple astronomy worksheet.

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

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

Learn the science of volcanic eruption with this cutaway diagram

This multi-page worksheet provides an opportunity for kids to practice both their understanding of food webs and their reading comprension skills.

Learn the difference between behavioral and physical adaptations with this cut-and-paste worksheet for second and third graders!

Get to know the Apollo 11 space mission in this science and history worksheet!

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

Invite your child to dream big and design their very own planet. Encourage both creativity and scientific speculation with this fun worksheet.

Dive into the deep, vast world of ocean science with this introductory sheet on the world's different oceans.

Is your child trying to answer the question what is weathering and erosion? This info sheet gives good definitions of the terms and some visual examples.

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

As your child matches up the body systems vocabulary with the correct definitions, she'll boost her life science knowledge and have fun doing it!

Give your budding chemist the facts and practice she needs for measuring with graduated cylinders.

Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

Children learn about the food cycle in a rain forest as they color in a scene of snakes, butterflies, leopards, and other forest-dwelling creatures.

This Earth Day quiz family and friends with this true or false questionnaire. It's all in good, informative, fun!

How did salt ever get into the ocean? Find out how, and then try conducting your own salt water experiment.

Budding scientists will learn about the density of salt water and perform an experiment with food coloring, salt water, and fresh water.

Practice geology vocabulary with this challenging crossword puzzle.

Which comes first, genus or phylum? To complete this life science crossword, kids need to put the 9 levels of biological classification in the correct order.

Is your fourth grader learning about electricity? This worksheet is all about circuits, tests her skills and reinforces the concept of how a circuit works!

All kids love animals, but how much does your child know about them? Kids will get to learn some animal vocabulary with this wild crossword puzzle.