Discover Earth’s four major systems, or spheres, in this engaging fifth-grade worksheet!

Which comes first, genus or phylum? To complete this life science crossword, kids need to put the 9 levels of biological classification in the correct order.

Ever wonder about how to make the perfect paper airplane? Learn about the four forces that affect flight with paper airplane physics!

Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Dr. McSquare is here to help kids learn the scientific method. His reports are all in disarray--can your child sort label each part with the correct step?

Help your child learn about one of the most elementary elements, gold.

Dr. McSquare needs help sorting out his lab reports. Can your child read each item, then label it with the correct scientific method step?

Learn the ins and outs of one of the body's most important organs: the heart!

Explore one of the great mysteries of the universe with this space science worksheet on black holes.

Learn more about the bones in your body and just how important they are with this reading sheet and diagram, all in one.

Discover some of the fascinating properties of gravity by studying one of Newton's famous laws, the Law of Gravitation.

Track down the missing matter in this fifth-grade science worksheet!

A fill-in-the-blank exercise on tornadoes, made for fifth grade science students.

Did you know people can live with just one kidney? Get a head start on human anatomy with this info sheet on kidneys.

How was our solar system created? Read a bit about one of the most well-known theories in this worksheet about the Big Bang.

Ever wonder how the human body functions? Enjoy this great info sheet all about the human heart, one of our most important organs.

Get charged up about static electricity with this informative fourth- and fifth-grade worksheet!

Learn how energy changes forms with this fourth- and fifth-grade physical science worksheet!

Learn all about the liver with this anatomy sheet. Our liver is one of many organs in the digestive system expelling waste from the body.