coal and petroleum

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Across
  1. 3. passing steam over white coke
  2. 4. used to produce heat
  3. 6. conversion wood into coal
  4. 9. boiling point 250-350 C
  5. 10. has 96 carbon content
  6. 11. 65 percent of carbon
Down
  1. 1. passing red hot coke
  2. 2. wise use of resources
  3. 5. used by plant to make food
  4. 7. components of different boiling
  5. 8. resource that will never run out