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

What is the water cycle? We're glad you asked! Learn about this amazing natural system that's been working for billions of years.

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

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!

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!

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