Energy Words

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Across
  1. 3. A fuel made from biological processes
  2. 4. A term describing heat derived from undergound sources
  3. 10. A system that converts solar energy into direct current (dc) electricity
  4. 11. A machine in power stations that has blades which are turned by water or wind
  5. 12. The act of adding a material to prevent heat loss
  6. 14. The process of removing oil from sediments by fracturing rock and applying hydraulic pressure
Down
  1. 1. The type of solar heating that occurs by orientating a house appropriately for windows to face the sun
  2. 2. A term used to describe oil that requires refining before use
  3. 5. The energy produced by utilising the kinetic energy of water stored behind dam walls.
  4. 6. A prefix meaning water
  5. 7. The material that saturates oil sands
  6. 8. Like petrol, it is formed from hydrocarbons with 6-12 carbon atoms, is a liquid and is easily combustible
  7. 9. This medium, and air may be heated by solar panels
  8. 10. The curved shape of solar power receiver troughs and reflector dishes
  9. 13. The process of splitting a plutonium or uranium atom into and thereby producing energy