Ever wonder what makes the leaves change colors in the fall? Find out with this fascinating life science worksheet.

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

You have a lot in common with all the other humans on this planet. You all have noses and arms and fingernails, but what makes you different?

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.

Discover some fun facts about the sun — and bring it to life with color — with this astronomy worksheet!

Learning about the functions of plant parts doesn’t have to be puzzling! Review the parts of a plant with this crossword for first and second graders.

Think toads and frogs are the same? Think again! Check out this breakdown of the differences between the two, complete with a quiz to check your new knowledge.

These pictures have a lot to say! The animals in this worksheet don't talkÃbut they can tell you a lot about what they're like by the way they look.

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

Does your little gardener know about compost? Quiz him on the basic elements of this excellent gardening tool.

Here is a brief introduction to The Great Pacific Garbage Patch for kids!

This packet of worksheets introduces children to food webs, an important life science concept.

Need a colorful way to impress your friends and family? This worksheet has got you covered!

Which animals can live happily alongside humans? With this word search, match up game, fun facts, your child will learn more about urban animal habitats.

Read about how the capybara live and other interesting facts about capybara. Sure to satisfy your curiosity about capybaras!

Crank out a better understanding of simple machines with this worksheet all about the wheel and axle!

Meet the master of compound machines: Rube Goldberg! His wacky contraptions put a whole new spin on the use of simple machines.

This page is all about building your kid's natural resources vocabulary words, along with research skills.

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.

Back in ancient times, before people knew what the stars were, they told stories about them! With this worksheet, learn about the constellation Cygnus.

Dragonflies are some of the oddest looking insects in the world, so it's appropriate that they have so many unique characteristics. Read all about them!

One of the most famous and easy to spot constellations is the Big Dipper! Formally known as Ursa Major, this constellation was named after a bear.

How much do you know about our solar system's planets? Kids learn facts about Neptune in an out-of-this-world worksheet.

Use these STEM design challenges to foster creativity and critical thinking skills in young learners while introducing them to the engineering process.

Blast off deep into space with this science worksheet featuring the dwarf planet, Pluto.

Break down a word to create new ones with this fun worksheet for second through fifth graders!

Can you identify the difference between inherited and acquired traits?

In this word scramble, children solve a riddle by identifying which things are made of plants and which are not.

Prepare for an exciting experiment with this cut-and-paste lab safety worksheet for first and second graders!

Use your detective skills to predict the motion of a seesaw in this third-grade worksheet!