C.2 Fossil Fuels

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Across
  1. 2. Number of fractions in the process of refining crude oil
  2. 6. Coal is a form of __________ energy
  3. 7. ______ impurities must be removed as they block the active sites of the catalysts used in later chemical processes.
  4. 8. Burning of fuels
  5. 10. Crude oil is made of alkanes, aromatic compounds and ____
Down
  1. 1. Process to refine crude oil
  2. 3. Minimum number of carbon atoms that can be found in the fractions.
  3. 4. Most efficient form of coal
  4. 5. Fossil fuels are produced through _________ respiration
  5. 9. Most abundant fossil fuel