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.

Discover Earth’s four major systems, or spheres, in this engaging fifth-grade worksheet!

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

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

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

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

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

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.

This water cycle worksheet is great for 5th grade scientists. Try this water cycle worksheet with your child as a review for test preparation.

Discover the difference between comets and asteroids in this stellar earth and space science worksheet!

Teach your child about plants with this worksheet, which helps your child practice botanical vocabulary.

The infamous Halley's Comet only comes around once every 75 years or so! Read some interesting info on the world's most famous comet.

What is geothermal energy? Find out how we use parts of the Earth to provide us with renewable energy!

Get to know the Apollo 11 space mission in this science and history worksheet!

That's not a lake... it's a crater! Get the scoop on some of the world's most well known craters with this space science worksheet.

What happens to water after it rains? Learn about the stages of the water cycle in this colorful worksheet!

Get to know Earth's star with with this diagram and vocabulary worksheet!

Encourage your little environmentalist to learn about composting! Children will boost their reading skills as they learn what compost is and how it helps the environment.

Discover examples of weathering, erosion, and deposition with this fourth-grade worksheet!

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

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

Unearth fossils in this explorative third-grade worksheet!

Analyze fossils with this engaging third-grade science worksheet!

Children get to know a few geology terms in this landform word search puzzle.

Learn about some of the major U.S. watersheds in this fascinating science and geography worksheet!

This Earth Day, learn about conservation and the environment while you enjoy solving a fun puzzle!