What is Earth's surface made of? Which natural resources are renewable? Why isn't it the same time everywhere? 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 * 96 pages of engaging and educational answers to many popular questions * Hundreds of labeled full-color illustrations * An index to key terms Fans of this book will...