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.

What's your favorite animal? Kids love answering that question, and with this animal research graphic organizer, they can write all about it.

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Explore grasslands and their fauna in this thought-provoking worksheet!

Introduce children to photosynthesis with this fill-in-the-blanks life sciences worksheet!

Did you know plants make their own food? Discover how with this fill-in-the-blank worksheet for third and fourth graders!

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

Are chickens mammals, fish, or birds? Sort animals by their traits in this informative life science worksheet!

Dive into a coral reef habitat with this second- and third-grade worksheet!

Explore the lush plant life of the tropical rainforest in this second- and third-grade worksheet!

Discover the details of desert plant life in this informative worksheet!

Dip your toes into a marsh habitat in this second- and third-grade worksheet!

Deserts might seem inhospitable to life, but there are actually plenty of animals that can live there!

Explore a tropical rainforest habitat and its inhabitants with this engaging worksheet for third graders!

Uncover the plant life of an icy tundra with this habitat worksheet for second and third graders!

Uncover secrets of the past with this third-grade worksheet about fossils!

Decide which plants could live in a grassland with this second- and third-grade worksheet!

Step into the swamp ecosystem with this engaging life science worksheet!

Determine which plants would survive in a pond with this second- and third-grade worksheet!

Decide which plants could survive in the desert with this second- and third-grade habitat worksheet!

Stroll through the flora of a temperate deciduous forest in this third-grade worksheet!

Dig into the past with this third-grade worksheet all about fossils!

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