Ever wonder what causes lightning to strike? Explore the physics of lightning with this striking physical science worksheet!

There are lots of stories around the world for the rabbit moon: a rabbit image seen in the shadows on the moon's face. Here's one for young moon-gazers!

Teach your child how to respect the ecosystem with a science worksheet that doubles as a coloring page. Can they identify the sources of pollution in the scene?

Use the clues in this crossword puzzle to fill in the blanks with different types of snake names. Learn interesting facts about snakes as you go!

Does your child love dogs? Test his knowledge on the different breeds of dog with some trivia questions!

Learn about the science behind one of nature's most awesome spectacles: monsoons.

Introduce your child to a fascinating new animal, the Baird's tapir. This is just one of many endangered species around the world.

Celebrate the fall season with this nature sketchbook, perfect for any lover of the outdoors!

This worksheet is a quick-reference tool of space vocabulary for kids, with an exercise to use the words properly in provided sentences.

This helpful worksheet lays out all the qualifications for planethood. A great way to start studying outer space science!

Animal lovers, get acquainted with a very unique species, the okapi! Read this info-sheet to learn about why this animal is endangered.

How do the Sun and the Moon interact with the Earth, and how do all three depend on one another? Find out in this science worksheet.

Discover some fun facts about the sun — and bring it to life with color — with this astronomy worksheet!

Learn a bit about the Brazilian rainbow boa with this cool science worksheet.

This colorful diagram is a handy reference guide for kids learning basic body systems.

These worksheets help kids understand food webs, an important part of the life science curriculum in fourth grade.

There are many endangered species all around the world. Read about the Amur leopard and why it's endangered with this information page.

Learn more about what lives--and what thrives--in marshes with this fill-in-the-blank worksheet on marsh ecosystems.

Have you ever wondered why manhole covers are round? It's a good thing to know -- big companies sometimes ask that question in interviews.

Our solar system has hundreds of moons! Read a bit about how a moon is formed with this lunar lesson.