Across
- 3. converting energy from the sun into power
- 9. renewable energy from plants and animalHydrogen Fuel
- 10. a machine that transforms rotational energy from a fluid that is picked up by a rotor system into usable work or energy
- 12. the transfer of energy by a force acting on an object as it is displaced
- 13. Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes.
- 14. type of renewable energy that is generated deep within the earth; produced by the breakdown of radioactive elements and high pressure together
- 15. an energy resource that is readily available or that can be replaced in a relatively short time; includes wind, moving water, sunlight, and wood
- 16. The ability to do work or cause a change
- 18. electricity generated from the energy of moving water
Down
- 1. a gas that traps heat near Earth, preventing the heat from radiating back into space; includes carbon dioxide and methane
- 2. states that in a chemical reaction energy is neither created nor destroyed
- 4. an energy resource that cannot be replaced in a relatively short time; includes fossil fuels and nuclear energy
- 5. a carbon-containing fuel formed over millions of years from the remains of living things
- 6. a clean fuel that, when consumed in a fuel cell, produces only water
- 7. also known as crude oil, or simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons, and is found in geological formations.
- 8. mostly the use of wind turbines to generate electricity
- 11. zero-emission clean energy source
- 17. Coal is a sedimentary deposit composed predominantly of carbon that is readily combustible.