From rushing river currents to the waves that crash along coastlines, water power is all around us.

For centuries, people have relied on the movement of water for transportation and a power source for simple machines. It can also be used to create the electricity we rely on every day. Readers (Grades 3-5) will find out what makes water flow from one place to another, how dams and turbines are used to harness hydropower, and much more.