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.

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.

Do you measure distance in inches or seconds? When do you use miles? Answer these and more with this third-grade worksheet about the customary system of measurement! 

Reflect on the effects of habitat change with this third-grade worksheet!

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

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

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

Find out all about the different parts of the eyes and how they work together to make vision possible.

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