How cool are chromosomes? Read what Steve the savvy scientist has to say about chromosomes and genes before testing your knowledge with some fill-in-the-blanks.

Studying human anatomy? Here is a great sheet that shows a diagram of all the muscle system. Your child will learn the scientific terms of the major muscles.

Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

How does blood flow through the heart? This worksheet prompts kids to map how blood is pumped through this sophisticated organ.

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

Children learn about the food cycle in a rain forest as they color in a scene of snakes, butterflies, leopards, and other forest-dwelling creatures.

Challenge your child' memory skills with this colorful worksheet. This fun printable will help with memorization skills and spatial awareness.

Learn more about the skin (and the science behind pimples -- ew!) in this printable life science diagram.

Learn more about the imposing tsunami with this worksheet about the science of tsunamis.

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

Find out more about single-cell organisms with this coloring page and diagram.

What happens to our food after we swallow it? Chomp on some body science with this diagram of the digestive system.

Read up on the digestive system with this page, which follows your food from start to finish.

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

There's not much in the animal kingdom more interesting than tentacles with suckers! Learn about octopus anatomy with this worksheet.

Did you know that air has substance too? Learn about air resistance, also known as drag. Air resistance affects the movement of all the things on our planet!

Did you know our sense of smell is also called "olfactory"? Learn about the structure and function of the nose with this human anatomy sheet.

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

Learn more about the swirling, whirling science behind tornadoes with this wild worksheet.

Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

Use clues to fill in the boxes in this crossword puzzle, and learn more about freshwater fish along the way.