1. © Oxford University Press 2011 IP1.16.5 Geothermal power stations Geothermal power stations

2. © Oxford University Press 2011 IP1.16.5 Geothermal power stations In some parts of the world where there is volcanic activity, rocks in the Earth heat up water, which rises to the surface as steam.

3. © Oxford University Press 2011 IP1.16.5 Geothermal power stations When the steam bursts through the surface it creates geysers. Old Faithful Geyser, Yellowstone National Park, Wyoming, USA

4. © Oxford University Press 2011 IP1.16.5 Geothermal power stations Here in New Zealand, boreholes are drilled into the ground to collect the steam. Geothermal field, New Zealand

5. © Oxford University Press 2011 IP1.16.5 Geothermal power stations This steam can be collected and piped to a power station to drive the turbines directly. Geothermal power station, Iceland

6. © Oxford University Press 2011 IP1.16.5 Geothermal power stations Geothermal energy can also be used to heat houses. Rural house in Larderello, Italy, heated by pipes carrying water and steam.

7. © Oxford University Press 2011 IP1.16.5 Geothermal power stations This is a geothermal pool. The water is heated by the hot steam rising up from inside the Earth. Geothermal pool, Andes, Ecuador