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.

Fossils have a lot to teach us about life on earth, but they can also be used to help teach kids the scientific method.

How does the butterfly become so beautiful? Learn about the four stages that it goes through in its life.

Here are four examples of mineral resources for kids to think about, plus a short explanation of what a mineral resource is.

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

Budding inventors can get a fun review of the simple machines with this word search.

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!

Worm your way through this soil maze, which doubles as a fun way to review the names of the different soil layers.

Children discover and review the parts of a flower and what they do as they complete this botany-themed crossword puzzle.

I spy with my little eye... six simple machines! Here's a fun way to help your child review the simple machines.

Can you help Cornelius create a crazy compost concoction? Help your child review his knowledge of compost and recycling with this fun worksheet.

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

Here's a fun way for kids to review their knowledge of earth science terms. Challenge your child to give a definition of each word as he finds it.

Can you tell which types of weathering caused each of these changes in the earth? This activity is a great way to review the 3 main types of weathering.

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.

Here's a fun way to review photosynthesis with your child! She'll show off her science knowledge as she answers questions to complete the crossword puzzle.

Learning about the functions of plant parts doesn’t have to be puzzling! Review the parts of a plant with this crossword for first and second graders.

Quiz your little scientist on his knowledge of the soil layers! He'll be reviewing some important earth science concepts and key terms.

If your child is fascinated by outer space, he'll love this solar system word search! While reviewing planet names, he'll ponder the mysteries of the universe.

Is a feather liquid, soft, spotted, or heavy? Practice describing everyday objects, or matter, with this second-grade science worksheet!

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

Analyze everyday objects and identify states of matter with this second- and third-grade science worksheet!

Learn about the texture and hardness of different objects in this second-grade worksheet!

Learn to read a standard thermometer in both Fahrenheit and Celsius in this informative second- and third-grade worksheet! 

How many machines can you find around the house? You may find them where you least expect it!

Discover the many different kinds of conifer and deciduous trees as you complete this word search!

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

In this North American animal tracks worksheet, students hone their observation skills by matching tracks to animals.