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What is geothermal energy? Find out how we use parts of the Earth to provide us with renewable energy!

Are cats trying to talk to us when they purr? Discover the meaning behind the purr in this worksheet that explores the three main types of cat purrs.

Read about Alexander Graham Bell, the man who made it possible for us to stay connected all day long, in this biography that comes with a science experiment.

Nature is all around us! But how much does your child know about our natural world? Test her knowledge with some nature fun-facts trivia.

Learn all about rivers--how they were formed, what they're made of, and what they do for us and the planet--in this reading and science worksheet.

Can you explain why your blue shirt is blue? This worksheet is full of facts about light and how it reacts with objects to give us the perception of color.

Hiccups interrupt us when we're talking and sometimes even get in the way of eating! Find out why we hiccup and discover some unusual ways to get rid of them.

Children learn why the light from the sun seems white to us, why we see objects in color, and why the sky is blue in this beautiful and fascinating worksheet.

When we get embarrassed or anxious, and all of a sudden our cheeks get red! Why does our body do this? Find out what scientists think blushing is all about.

Take a science-filled trip to an amusement park in this third- and fourth-grade worksheet!

This science worksheet tells all about James Watt, the man that powered the Industrial Revolution.

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.

Children learn the fascinating physics behind lightning, along with a few fun facts, in this physical science worksheet.

What is the Earth? Here is a reading passage and a word search to help your kid get acquainted with Earth science.

Here's a great way to teach your kids more about our solar system. This worksheet focuses on the dwarf planet, Pluto.

Search for natural resources with this fun worksheet for second and third graders!

Analyze fossils with this engaging third-grade science worksheet!

Get a lesson in sports and science with this engaging third- and fourth-grade worksheet!