What is an ecosystem, and how does the sun play an important part in what every living thing eats? Find the answers to these questions and much more in this unit about food chains. Students discover what a food chain is, how animals can be both predators and prey, and how every food chain starts with the sun as they learn about food chains of animals that live in the arctic, Australian woodlands, boreal forests, coniferous forests, deciduous forests, deserts, grasslands, marshes, mountains, oceans, ponds, rain forests, and the tundra. Students can personalize this book by coloring the illustrations and tracing the key words in the space provided. Incorporate some fun and handwriting practice into science. A review activity sheet with answer key is also included. 21 pages total.