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.

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.

Read the definitions given for soil, sand and dirt then write down where each element can be found below the pictures.

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.

Learn how sand dunes form, and a little bit about desert formations like yardangs as well, in this science summary sheet.

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

Learn about drag, air resistance, and Newton's laws with this cool worksheet on bobsled physics!

Help your budding geologist learn about these common landforms in this worksheet on peninsulas and capes.

Find out the the cool science behind ice cubes with this fun worksheet.

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

Get out there and see what nature has to offer! This personal goal-setting worksheet will help your first grader get a head start on the summer.

Get to know each of the Seven Summits, then organize their heights into a graph.

All of these products are made from plants, or they can be! Practice using a Venn diagram, researching and classifying items with your kids.

Kids can explore ideas of storytelling and science as they fill in this comparison grid with their opinions. Start a conversation of ideas with this worksheet!

Without reflective surfaces, this biker would have a much more dangerous ride. Can you find all five reflective surfaces present in this scene?

Ever wonder why sounds change as they move away from us? Learn all about the Doppler effect with this physics worksheet.

Find out how scientists explain our yawns and use the graph to keep track of your family's yawns for a whole day!

Let your child put her thinking cap on and take a moment to write about the influence people might have had on the formation of landforms.

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

Did you know that 763 Earths could fit inside Saturn? Learn more fun facts about Saturn on this fun science printable.

Practice identifying living and nonliving things with this first- and second-grade science worksheet!

Can you tell if it is sunny, windy, or cloudy outside? Learn about different types of weather in this worksheet for kindergarteners and first graders!

Learn about the features of plant and animal cells in this compare-and-contrast worksheet!

With your experiment data and analysis in hand, it’s time to draw your conclusions!

Describe how things feel when you touch them and push on them!

Explore the lush plant life of the tropical rainforest in this second- and third-grade worksheet!

Dip your toes into a marsh habitat in this second- and third-grade worksheet!