crude oil

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Across
  1. 2. a clear colourless flammable mixture of light hydrocarbons. Use: raw material for many petrochemicals and plastics.
  2. 4. temperature at which liquid boils
  3. 8. the forces produced between molecules
  4. 10. a sticky mixture of hydrocarbons found in substances such as tar.
Down
  1. 1. separation of components from a volatile liquid
  2. 3. an open-chain hydrocarbon containing only carbon-to-carbon or carbon-to-hydrogen single bonds
  3. 5. an organic chemical compound containing only hydrogen and carbon atoms
  4. 6. separated component
  5. 7. unrefined petroleum
  6. 9. soaked or full