"What is Earth's surface made of? Why do animals migrate? Which natural resources are renewable? Learn the answers to these questions and many more in this engaging and indispensable resources"--Back cover
How do trains work? What types of trains are there? Where do they take you? The Do You Know? TM series provides in-depth looks at a wide range of popular subjects. Appealing to children who want to know everything, each thought-provoking book features Fans of this book will also enjoy other in the same series, including Jobs , Dinosaurs , Oceans , Space , Vehicles , Earth , and Animals . An indispensable resource for any child's library!