The first module, Food Webs, explores the links between living things and their energy sources. Linking back to the Energy Sources module in the Physical Science Book, Food Webs shows how food chains are built linking the sun, plants, and animals as energy sources and/or users.
The Habitats module focuses on the needs of living things. As students consider different habitats, from farm to tundra and grasslands, they begin to understand the importance of both living and nonliving things in a habitat. Students learn about many different habitats and how animals and plants have adapted in order to thrive where they live.