plate tectonics

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Across
  1. 4. rigid layer of the Earth's crust that is believed to drift slowly
  2. 5. is the phenomenon associated with volcanic activity
  3. 8. the regions of the Earth where living organisms exist
  4. 10. a fissure in the earth's crust through which gases erupt
  5. 12. crash together with a violent impact
  6. 14. use again after processing
  7. 15. movement of the edge of one tectonic plate under another
  8. 16. is the chemistry of the earth's crust
  9. 17. is the branch of geology studying the folding and faulting of the earth's crust
  10. 18. subject to or caused by an earthquake or earth vibration
  11. 19. a specialist in the history of the Earth recorded in rocks
Down
  1. 1. is a person with advanced knowledge of empirical fields
  2. 2. any state or process known through the senses
  3. 3. molten rock in the earth's crust
  4. 6. rock that in its molten form issues from volcanos
  5. 7. a scientist devoted to systematic investigation
  6. 9. a geologist who uses physical principles to study the properties of the earth
  7. 10. relating to eruptions of gas and lava from the earth's crust
  8. 11. reduce or cause to be reduced from a solid to a liquid state
  9. 13. organisms interacting with their physical environment
  10. 16. science of the history of the earth as recorded in rocks