6.1-6.4 Crossword

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Across
  1. 1. The cleanest fossil fuel, its mostly methane
  2. 4. As the world becomes more industrialized, the need for energy
  3. 6. Energy sources that can be replenished naturally.
  4. 8. Commonly used as fuel in the forms of charcoal and fire
  5. 9. Resources of energy are found all over the world
  6. 10. Can be recovered form tar sands
Down
  1. 1. Energy sources that exist in a fixed amount.
  2. 2. What fuels consumers can get
  3. 3. Partially decomposed organic matter burned for fuel
  4. 5. Take advantage of the different boiling points of fuels
  5. 7. The most widely used sources of energy.