Review the rock cycle with this second-, third-, and fourth-grade crossword puzzle!

Launch into learning with this worksheet on Gemini 4, one of the original missions in the early days of the U.S.'s space program.

Unearth fossils in this explorative third-grade worksheet!

Analyze fossils with this engaging third-grade science worksheet!

Uncover secrets of the past with this third-grade worksheet about fossils!

Dig into the past with this third-grade worksheet all about fossils!

Discover the phases of the moon with this third- and fourth-grade space science worksheet!

Never heard of the planet Pirjute? That's because it's Jupiter, with mixed-up letters! Kids unscramble planet names on this third grade science worksheet.

Study the night sky with this hands-on science worksheet for third and fourth graders!

Look for natural resources around a farm in this engaging worksheet for second and third graders!

Search for natural resources with this fun worksheet for second and third graders!

Help third and fourth graders become rock stars with this informative geology worksheet!

Discover the animals and plants of the past in this fossil-focused worksheet!

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

Search for natural resources at the beach in this engaging worksheet for second and third graders!

Try to find natural resources in this camping-themed worksheet for second and third graders!

For kids learning geography or earth science, this is the perfect review sheet for drilling students on common geography terms and phrases.

Third grader today, astrophysicist tomorrow! Let your child research their planet of choice, and discover everything from the number of moons to temperature.

Our ecosystems need a protector; is your third grader up to the challenge? Identify harmful pollutants in a science worksheet that doubles as a coloring page.

Renewable energy is extremely important for the Earth's future! Test your child's knowledge of renewable resources with this review sheet.

Without rain, we wouldn't have any puddles to splash and stomp in. Does your third grader know why and how rain falls from the clouds?

Earth has many different land and water features—can you recognize them? Test your knowledge with this crossword puzzle for third and fourth graders!

A fun challenge for kids, this Earth Day crossword puzzle is a great way to review facts about the Earth and get a reminder on how to live green.

Did you know the surface of the Earth is always changing? Learn about the events that change Earth's surface with this crossword puzzle for second and third graders!