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

Brush up on some physics vocabulary with this energy word search!

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

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

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

Are students studying electricity? Give them a break from the scientific nitty-gritty with this fun word search full of electricity terms!

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

Budding inventors can get a fun review of the simple machines with this word search.

A lot of common objects use electromagnets to work. This word search will get your child thinking about all the electrical and mechanical devices around her!

Students flex their physical science knowledge by classifying items as solids or liquids in this fourth grade states of matter worksheet.

Discover different types of energy with this third- and fourth-grade science worksheet!

Engage your little scientist with a fun word search, all about sinking and floating! He'll be learning a basic concept of physical science.

Determine which magnets have the strongest force in this third- and fourth-grade worksheet!

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! 

This science vocabulary activity is packed with basic science vocabulary words to help the youngest kids warm up to scientific concepts.

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

Unscramble key vocabulary words about energy and collisions with this engaging science worksheet!

Use a seesaw to see what happens when opposing forces become balanced or unbalanced!

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!

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

Read about Alexander Graham Bell, the man who made it possible for us to stay connected all day long, in this biography that comes with a science experiment.

Pull the lever on learning! Get to know one of the six simple machines with this worksheet about the lever.

What's the difference between renewable and non-renewable energy? Help your student discover the various forms of energy we use each day.

Apply concepts of energy and motion to marbles in this fourth-grade worksheet!

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

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

What is water energy? Also known as hydro power, water energy is one of our important renewable resources!

Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

Match forms of energy to common examples in this third- and fourth-grade science worksheet!

Connect forms of energy to real-life scenarios in this third- and fourth-grade worksheet!