Together, water and photosynthesis are the source of all life on Earth! Little curious minds will enjoy discovering the ins and outs of photosynthesis.

Students hone their understanding of the similarities and differences between animal cells and plant cells in this middle grades life science worksheet!

Learn about the human brain with this zombie-themed science worksheet!

How much do you know about man's best friend? This fun worksheet is jam-packed with fun facts about dogs!

Students use a food web to identify the roles of organisms in an ecosystem and draw conclusions about the cycling of matter and flow of energy.

Learners will discover a simple overview of the human muscle system in this introductory worksheet.

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.

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

Did you know that invertebrates don't have backbones? Find out some different types of invertebrates with the clues in this crossword puzzle.

Learn about the stages of mitosis with this helpful biology handout!

Fourth and fifth graders will cut out and assemble a human skeleton from paper in this engaging life sciences printable.

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

Review the different body parts with a fun crossword! This is a great way for your little doctor-in-training to review the basic organs and their functions.

Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

Flex your mind muscles with a body science worksheet! Your child will learn the fundamentals of what makes up our muscles.

Budding biologists can learn all about human digestion with this information page, complete with a diagram of the digestive system.

Give students an opportunity to model how genes are passed down to offspring with the help of this Punnett squares worksheet!

There are some parts of our brains that are still too complicated for scientists to understand! Find out the basics of the brain's functions with this fun page.

An energy pyramid is a simple way to graphically show how energy flows in an ecological community; somewhat similar to the food pyramid.

Learn about the many different biomes the Earth is home to in this life science worksheet, which holds the answers to some simple life science questions.

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

Explore the difference between natural and artificial selection with this engaging life science worksheet for middle grades!

Dragonflies are some of the oddest looking insects in the world, so it's appropriate that they have so many unique characteristics. Read all about them!

For those of you studying human anatomy, here is a great diagram of the major organs in our body!

How many teeth does an alligator have? Find out with this fun worksheet, dedicated to teaching you and your child all about alligators!

This diagram of a human skeleton is labeled with 12 major bones, from skull to fibula.

Students learn about the relationship between the structure and function of cell walls and cell membranes in this engaging life science worksheet!

Learn how sensory information is processed by the somatic and autonomic nervous systems with this engaging science worksheet! 

Get to know the residents of the reef with this coral reef-themed crossword, perfect for expanding life science knowledge and working on vocabulary, too!

Students are introduced to the different types of symbiotic relationships that exist in ecosystems in this life science worksheet.