Water is essential for all life on Earth. It's critical that people understand the water cycle, how water travels on and within the planet, and their role in keeping water clean and available for everyone's use. This valuable volume can help! It offers a wealth of interesting information about bodies of water, freshwater and saltwater sources, watery habitats, and efforts to fight water pollution. Quizzes, graphic organizers, illustrations, and activities further engage readers with curricular concepts and reinforce the many key ideas.