Energy's the Word

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Across
  1. 2. A Nonrenewable compound formed in the Earth's crust from the remains of prehistoric organisms
  2. 5. The use of combusting organic matter to produce energy
  3. 7. Long-term pattern of weather in an area
  4. 10. Energy sources with a fixed amount on Earth
  5. 12. Energy harnessed from sunlight
  6. 14. A fossil fuel composed mostly of methane
  7. 15. Heat energy from inside the Earth
  8. 16. Energy harnessed from the movement of water
  9. 17. Energy harnessed from the movement of air
Down
  1. 1. Renewable energy sources that could never be used up
  2. 3. The practice of responsibly using resources over time
  3. 4. A combustible black or dark brown rock consisting mainly of carbonized plant matter
  4. 6. Energy harnessed from heating water via the fission of atoms
  5. 8. Renewable energy sources that could be used up in a lifetime
  6. 9. Energy sources that can be replenished
  7. 11. The nonrenewable fuel used in nuclear power plants
  8. 13. A greenhouse gas produced by burning carbon and organic compounds and by respiration