Learn about the California tiger salamander, which uses its toxic, bad smell as a defense.

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

If you're fascinated by bugs, check out this coloring page featuring the insect order Odonata, which consists of damselfies and dragonflies.

All the animals in this word search share one characteristic: none of them have bones! Can your child find the boneless critters hidden in the puzzle?

Learn more about what lives--and what thrives--in marshes with this fill-in-the-blank worksheet on marsh ecosystems.

These clever birds harden and disguise themselves as tree branches when threatened. Learn more and do some coloring with this worksheet.

Did you know wolves are the largest members of the dog family? This fun worksheet is jam-packed with fun facts about the wolf!

Here's a creature that can be a heard a mile away: a thick-billed parrot. Learn more about these birds that are the only parrots native to the USA.

Ready for liftoff? Take to the starry skies with this worksheet that explores the three basic types of galaxies.

Did you know chameleons can sleep upside-down? Learn more about chameleons with this fun worksheet, jam-packed with fun facts and activities!

What is the Earth made of? Find out everything that goes on just below the surface in this science reading worksheet.

Dreams can be delightful or downright terrifying. Discover the science behind dreams and try to figure out what your dreams say about you.

Did you know you're 1,000 times more likely to drown than you are to be bitten by a shark? This fun worksheet is jam-packed with fun facts about the shark!

This worksheet features a scientific explanation and awesome photos of solar eclipses, which are extremely rare scientific phenomena.

Children get to know a few geology terms in this landform word search puzzle.

How much do you know about the U.S. national bird? Learn all about the bald eagle with this fun, informative worksheet!

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.

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.

Did you know an elephant can eat 300 pounds of food in one day? This fun worksheet is jam-packed with fun facts, a word search and trivia, all about elephants!

The animal names on this third grade science and spelling worksheet are all mixed up! Kids unscramble reptile and bird names to complete the worksheet.

Do you know what's the largest parrot in Africa? It's the African grey parrot! Learn about this blabbering bird and give the image some color.

Why did the fox cross the road? To look for the chicken! This fun worksheet is jam-packed with fun facts about foxes!

What happens to water as it travels through mushy, smushy wetlands and swamps? Find out all about the water cycle and fill in scientific terms in the swamp.

The California condor has been brought back from the brink of extinction. This worksheet will help your little bird lover learn all about the condor.

Does your child have a knack for astronomy? Teach him about the constellations with this great worksheet.

A fun challenge for kids, this Earth Day crossword puzzle is a great way to review facts about the Earth and get a reminder on how to live green.

Does your little gardener know about compost? Test their knowledge of this sensationally smelly earth science process!

This worksheet is all about the U.S. space mission of Friendship 7, and will help kids with reading comprehension and U.S. history knowledge all at once.

Ever wonder what's inside a camel's hump? Find out with this fun worksheet! It's jam-packed with facts about camels.

Ever wonder why zebras have so many stripes? Find out with this fun worksheet all about the zebra!