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Got a kid who's crazy for crosswords and the planet? Check out our Earth Day crossword puzzle, full of fun facts about the Earth and its many inhabitants.

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

Take a peek into a temperate forest ecosystem with this food web worksheet for fourth and fifth graders!

Have fun learning about food chains in this charming 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!

This Awesome Anatomy page focuses on the heart and how it pumps blood to all parts of your body.

Discover the connections between the sun, plants, and animals in this fifth-grade worksheet all about photosynthesis!

Need to know all about the lungs? Study up with this comprehensive lung anatomy worksheet.

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

Learn about drag, air resistance, and Newton's laws with this cool worksheet on bobsled physics!

Fourth and fifth graders will cut out and assemble a human skeleton from paper in this engaging life sciences printable.

Discover how water flows in this informative environmental science worksheet!