On a rainy day, water soaks into the soil. It splashes onto sidewalks and trickles down tiny cracks in the concrete. Where does it go? Deep beneath our feet! We can't see Earth's groundwater, but just like the water on the surface, it's trickling, rushing and moving from one place to another. It's also used as a source of precious fresh water. Readers will learn all about groundwater, including: How does water get into the ground? How does underground water end up in rivers, lakes, and oceans? How do people build wells to access groundwater? And how does groundwater bubble up to the surface to create an oasis in a hot, dry desert? Filled with information perfectly suited to the abilities and interests of an early elementary audience, this colorful, fact-filled volume gives readers a chance not only to learn, but also to develop their powers of observation and critical thinking. With its stunning photographs and surprising, high-interest facts, this book makes learning about water an engaging experience.