Non-Renewable Energy

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Across
  1. 2. the most common energy source on earth are ______ fuels
  2. 5. fossil fuels release ________ into the atmosphere
  3. 6. _______ is a dark, carbon rich fossil fuel
  4. 7. _________ is an accumulation of partially decayed vegetation or organic matter.
  5. 8. the process of burning fuel to produce
  6. 9. a method of extracting oil and gas by fracturing rock layers
  7. 12. many oil reserves are found in the _______ east
  8. 15. natural gas consists of mostly ________ and other hydrocarbons
  9. 16. ________ is formed from the decomp. of organic materials underground
  10. 17. _______ fuels are created from the remains of living organisms
  11. 18. uranium is a _______ element used in nuclear power plants to generate electricity
  12. 19. ________ has the highest carbon content of any type of coal
  13. 21. coal is formed from the fossilized remains of _______ and animals
Down
  1. 1. non-renewable resources take millions of years to form are _________
  2. 3. natural gas is often used for ________ homes
  3. 4. dioxide __________ is a byproduct of burning fossil fuels
  4. 10. the burning of fossil fuels is a major reason for _______ change
  5. 11. oil is a liquid fossil fuel also known as _______
  6. 13. _________ horizon can be caused by oil spills in the ocean
  7. 14. the thick, sticky form of crude oil found in tar sands
  8. 20. fossil fuels are formed under intense ________ and pressure