Across
- 4. heat from the sun is collected, stored and used primarily for domestic hot water heating but also can be used for space heating
- 8. energy that is renewable
- 10. the efficiency of energy
- 11. how to farm wind
- 13. Energy from water
- 14. the conservation of energy
- 15. acts as a drug and is produced by fermentation of grains, fruits, or other sources of sugar.
- 16. generation of electricity and other energy jointly, especially the utilization of the steam left over from electricity generation to produce heat.
Down
- 1. collects heat as the sun shines through south-facing windows and retains it in materials that store heat
- 2. Energy from the heat of the Earth
- 3. Fuel that is made from biomass
- 5. the conversion from ocean to thermal energy
- 6. energy from tidal movements
- 7. a cell is fuel for a vehicle or power plants
- 9. energy that alternative
- 12. (CH4) is a hydrocarbon that is a primary component of natural gas.