Carbon Sources Crossword

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Across
  1. 6. lithosphere
  2. 8. stratosphere
  3. 10. coal
  4. 11. thermosphere
  5. 12. mesosphere
  6. 15. organic
  7. 16. burning
Down
  1. 1. carbon
  2. 2. plants
  3. 3. sediments
  4. 4. atmosphere
  5. 5. decomposition
  6. 7. gas
  7. 9. oil
  8. 13. biosphere
  9. 14. oxygen