Discover how animal behaviors increase the probability of successful reproduction and offspring survival with this middle school science worksheet!

Explore how the fossil record is used to study the evolution of organisms in this engaging science worksheet for middle grades!

Get to know your genes with Steve the savvy scientist! Genes help determine everything from your hair color to your height.

Learn the difference between behavioral and physical adaptations with this cut-and-paste worksheet for second and third graders!

Students read about genetic mutations in order to understand how mutations affect organisms in this engaging life science worksheet!

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

Dive deep into your body's circulatory system with this worksheet on blood and what it's made of.

There's a lot happening beneath the waves, including the ocean food web. Take a closer look with this colorful printable.

Learn more about the skin (and the science behind pimples -- ew!) in this printable life science diagram.

Cranium, noodle, melon, noggin...the human skull has been called a lot of things over the years. Here are the proper names for each part.

This multi-page worksheet provides an opportunity for kids to practice both their understanding of food webs and their reading comprension skills.

Explore the difference between asexual and sexual reproduction in organisms with this middle school science worksheet!

This skeletal system worksheet, featuring a funny diagram of a human skeleton, is just the thing kids need to master their skeletal system vocabulary.

Children will learn important facts about food chains in these worksheets.

Looking for a fourth grade worksheet to help your kid with science? This printable will test his knowledge of the water cycle.

Learn the ins and outs of one of the body's most important organs: the heart!

Which comes first, genus or phylum? To complete this life science crossword, kids need to put the 9 levels of biological classification in the correct order.

Facts about ostrich include that they are the largest birds in the world and that they can't fly, but that's not all. Learn all about this amazing bird!

This Awesome Anatomy coloring page is all about the human eye, and makes a handy study tool as well!

A useful overview of terrestrial biomes, including a climate key.

This science vocabulary activity is packed with basic science vocabulary words to help the youngest kids warm up to scientific concepts.

Introduce students to the ecological benefits of terracing with this middle grades science worksheet!

Studying the human body? Get to know your body inside and out with this muscle diagram.

Does your budding biologist know his plant parts? Get a great review of some important plant vocabulary with this info page.

Color in this Awesome Anatomy page on the respiratory system and learn about how we breathe!

Kids need lots of things to grow up healthy and strong, and plants do, too! Can your child think of things a plant needs to grow?

Get some cool facts about geckos on our reading and writing worksheet! Your little one is sure to be tickled by all the curious facts about geckos.

Your child will write about his or her favorite animal. Kids will research their favorite animals online or at the library, then write down three facts.

Get outside and take a stroll! This leaf guide will give your little one a great learning experience the next time you're out at the park.

All living things go through cycles. Learn about the life cycle of an amphibian with this diagram of the life of a frog!