How did salt ever get into the ocean? Find out how, and then try conducting your own salt water experiment.

Build nature vocabulary with this habitat-matching worksheet!

Review the different body parts with a fun crossword! This is a great way for your little doctor-in-training to review the basic organs and their functions.

Budding scientists can learn about an important physical science concept with this worksheet all about density!

Learners will discover what heat waves are, and how they are connected to global warming, in this two-page earth sciences worksheet.

Flex your mind muscles with a body science worksheet! Your child will learn the fundamentals of what makes up our muscles.

Can your little geologist identify the three main types of rock? Test his earth science savvy with a matching activity.

Budding biologists can learn all about human digestion with this information page, complete with a diagram of the digestive system.

Learn more about the mysterious brain and how it works with this brain anatomy worksheet.

Invite your child to dream big and design their very own planet. Encourage both creativity and scientific speculation with this fun worksheet.

If you push your little brother, does he push back? Well, according to Newton's third law of motion, he does!

Learn the science of volcanic eruption with this cutaway diagram

Budding scientists will learn about the density of salt water and perform an experiment with food coloring, salt water, and fresh water.

Is your fourth grader learning about electricity? This worksheet is all about circuits, tests her skills and reinforces the concept of how a circuit works!

Here's an introduction to different types of rocks.

Facts about ostrich include that they are the largest birds in the world and that they can't fly, but that's not all. Learn all about this amazing bird!

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.

Can your child tell what will be attracted by a magnet? Challenge him to think about why magnets attract certain objects.

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

Explore the circle of life with this informative coloring sheet! Help your student color and learn the names of each stage of a frogâs life.

Use your knowledge of sea creatures to fill out this crossword puzzle.

There are some parts of our brains that are still too complicated for scientists to understand! Find out the basics of the brain's functions with this fun page.

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.

Children get to know a few geology terms in this landform word search puzzle.

Test your knowledge of prehistoric animals with this life sciences crossword puzzle!

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

Learn about the many different biomes the Earth is home to in this life science worksheet, which holds the answers to some simple life science questions.

Play a fun game that combines the periodic table with a classic concentration game.

This thermometer worksheet gives your child practice reading and using a thermometer. Try this thermometer and temperature worksheet with your child.

In this recycle worksheet, kids color the different recyclable objects, then match them up with their corresponding bin. Try our recycle worksheet on Earth Day.