Nonrenewable Energy

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Across
  1. 1. Carbon in biomass that was recently in the atmosphere
  2. 4. Woody material that was heated in the absence of oxygen
  3. 6. Electricity gained from the nuclear energy in nuclear fuel
  4. 7. fuels derived from biological material
  5. 12. When a parent radioactive isotope emits alpha / beta particles, etc.
  6. 14. A mix of hydrocarbons that exists in a liquid state underground
  7. 15. Also known as oil sands
  8. 16. A brown coal that is a soft sedimentary rock
  9. 17. Electrical demand by a device that draws electrical current even when its off
  10. 18. Old carbon contained fossil fuels
  11. 19. A precursor to coal
Down
  1. 2. A black or dark brown coal that contains bitumen
  2. 3. The emission of ionizing radiation or particles
  3. 5. A solid fuel made from the remains of trees
  4. 6. An energy source with a finite supply
  5. 8. Short for hydraulic fracturing
  6. 9. Also known as hard coal
  7. 10. A colorless, odorless gas
  8. 11. Nuclear fuel that no longer produces enough heat to be useful
  9. 13. A relatively clean fossil fuel containing mainly methane