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