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

We all know the famous equation E = MC^2. But what does it mean? Learn a bit more about Einstein's famous energy equation with this physical science worksheet.

Is a feather liquid, soft, spotted, or heavy? Practice describing everyday objects, or matter, with this second-grade science worksheet!

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!

Explore magnetism with this colorful science worksheet for third and fourth graders!

What do juice, water, and tea have in common? Compare and contrast matter in this engaging second-grade worksheet!

Learn how conductors and insulators affect the flow of electricity in this helpful fourth- and fifth-grade worksheet!

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

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! 

Ever wonder what causes lightning to strike? Explore the physics of lightning with this striking physical science worksheet!

What do a key, a goldfish, and a tortoise shell have in common? Find out with this second-grade science worksheet!

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.

What is the difference between condensation and evaporation? Learn about natural cooling and heating processes that are caused by changing states of matter!

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

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

Is your child baffled by the scientific method? Dr. McSquare is here to help! Learn the steps by helping the doctor organize his lab reports.

Hypothesis, observation, data...with so many terms, learning the scientific method can be tricky. Learn the steps by helping Dr. McSquare sort out his reports.

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?

Learn about some of the most common forms of energy with this helpful one-pager for third graders!

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

Warm up your scientific thinking with this colorful worksheet!

Take a science-filled trip to an amusement park in this third- and fourth-grade worksheet!

Explore the applications of electrical energy with this helpful second-grade worksheet!

Mix, boil, and toast your way to understanding energy transformations with this fourth-grade 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!

If your scientist is mad for magnets, let him explore a few fun facts about magnetism with this physics page!

Learn about the texture and hardness of different objects in this second-grade worksheet!

Rainbows look like swipes of brightly colored paint hanging in the sky. Have you ever wondered how they got there?

Review energy terminology with this fun fourth-grade crossword puzzle!