Did you know that Earth's surface is mostly covered by water? We live in a world full of water. The water is all around us, and even within us! In Un Mundo de Agua, young readers will learn more about where water is on Earth and how it moves from one place to another. --The Mi Biblioteca de Ciencias de la Tierra y el Espacio/My Earth and Space Science Library series gives an introduction to a variety of Earth and space science topics for beginning readers based on NGSS. From our amazing world of water to how to protect our planet, these books present scientific concepts in easy-to-understand language with kid-friendly examples. Each book includes a photo glossary and an activity that supports further comprehension.