Across
- 2. the process by which the wind is used to generate mechanical power or electricity
- 3. renewable source of energy that generates power by using a dam or diversion structure to alter the natural flow of a river or other body of water
- 4. energy from a source that is not depleted when used, such as wind or solar power.
- 7. a viscous liquid derived from petroleum, especially for use as a fuel or lubricant.
- 8. a combustible black or dark brown rock consisting mainly of carbonized plant matter, found mainly in underground deposits and widely used as fuel
- 10. flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally underground (often in association with petroleum) and used as fuel.
Down
- 1. sources that will run out or will not be replenished in our lifetimes
- 5. a form of energy released from the nucleus
- 6. energy generated or produced by living or once-living organisms.
- 9. radiant energy emitted by the sun