1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:Where do most of the world's trees...What resources are used to build a...Why is there lots of heavy industr...How do ore deposits form?*How do we get power from flowing w...*How is iron obtained from its ore?How does coal form?What is carbon used for?What is a renewable resource?What is recycling?What is petroleum? How do we get power from flowing water? Since ancient Egyptian times, water wheels that turn in a river's current have been used to drive mills. The same principle is used to make electricity. Water is released from a dam, and as it falls, its energy is used to turn a set of turbines, each of which drives an electrical generator. Electricity is generated in hydroelectric power plants.   Previous: Back Book: 1001 Section: Earth Chapter: Resources