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

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

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

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

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

How do the Sun and the Moon help us prove Earth’s shape? Find out with this fifth-grade worksheet!

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

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.

Kids write down examples of solids, liquids, and gases in this 1st grade physical science worksheet that focuses on the states of matter.

Energy is a crucial part of physical science! All things on Earth have energy, whether it's potential or kinetic.

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

A handy worksheet that breaks down the properties of metal. A good physical science review sheet to keep around for reference.

This painless--even fun!--worksheet gets middle-grade students practicing with the information in the periodic table of elements.

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.

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

Arm your budding physicist with a free print-out version of the periodic table of the elements!

Test your knowledge of the periodic table of the elements with this quiz page!

Did you know that sound is actually caused by movement? Vibrations of particles create the sound that we hear.

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

This worksheet teaches kids about the physics of hockey, applying principles of classical mechanics to an effective slapshot.

After he fills in the blanks, your student can hold on to this worksheet on hydrogen for reference when preparing for tests and quizzes on physical science.

Lab mice have stolen information from these elements! Students must set everything back in order using the provided periodic table of elements.

Give middle-grade students a painless beginner's introduction to the periodic table of elements with this fun worksheet.

Some devious mice have stolen important information from the periodic table. Can middle-grade chemists put the elements back together again?

This colorful worksheet builds an early chemistry foundation, giving middle school students practice with the periodic table of elements.

Important information has gone missing from the periodic table. Can you fix up these elements so that they read the right way?

This thoughtfully labeled periodic table includes information about the properties of all 103 elements.

Children are introduced to the concept of the speed of light in this illustrated worksheet.

Young scientists are the only hope for finding the missing information from these elements of the periodic table!

This list of elements is missing mega-information: a combination of category, name, number, or symbol. Can you fix them up?