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