Energy's the Word

2. A Nonrenewable compound formed in the Earth's crust from the remains of prehistoric organisms
5. The use of combusting organic matter to produce energy
7. Long-term pattern of weather in an area
10. Energy sources with a fixed amount on Earth
12. Energy harnessed from sunlight
14. A fossil fuel composed mostly of methane
15. Heat energy from inside the Earth
16. Energy harnessed from the movement of water
17. Energy harnessed from the movement of air

1. Renewable energy sources that could never be used up
3. The practice of responsibly using resources over time
4. A combustible black or dark brown rock consisting mainly of carbonized plant matter
6. Energy harnessed from heating water via the fission of atoms
8. Renewable energy sources that could be used up in a lifetime
9. Energy sources that can be replenished
11. The nonrenewable fuel used in nuclear power plants
13. A greenhouse gas produced by burning carbon and organic compounds and by respiration