Fossil Fuels

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Across
  1. 3. the US consumes _____ of all the oil produced in the world
  2. 4. coal mining increases this
  3. 5. oil is formed from the ____ of small animals, algae, and other organisms
  4. 10. uneven distribution of fossil fuel reserves often causes this
  5. 12. this is the most plentiful fossil fuel in the U.S.
  6. 13. _____ percent of the world’s oil supply is located in the U.S.
  7. 14. natural gas is a mixture of ______ and other gases
  8. 15. used to cook foods and heat homes
  9. 16. fossil fuels take hundreds of ______ of years to form
Down
  1. 1. natural gas has no _______
  2. 2. fossil fuels are ____ resources
  3. 6. coal, oil, and natural gas
  4. 7. burning most coals results in this
  5. 8. ______ transport natural gas
  6. 9. run off from coal mines causes this
  7. 10. this is used to make plastics, paints, medicines and cosmetics
  8. 11. another name for oil