Hydrocarbons

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Across
  1. 3. A Component of a hydrocarbon
  2. 4. Hydrocarbons made of short chains have a ........ boiling point
  3. 7. The process used to make useless long chains hydrocarbons into useful shorter chain hydrocarbons
  4. 8. We separate out the different fractions using a process called fractional ..........
  5. 11. A component of a hydrocarbon
  6. 12. Fuel from organisms that died millions of years ago we call ....... fuels
Down
  1. 1. Hydrocarbons with a single bond between the carbon atoms
  2. 2. Crude oil is made up of a mixture of these
  3. 5. Hydrocarbon used to fuel cars
  4. 6. We use it faster than we can replace it
  5. 9. Hydrocarbons with a double bond
  6. 10. Oil freshly drilled up from underground
  7. 11. Hydrocarbons made of long chains have a ........... boiling point