plate tectonics

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Across
  1. 2. vent in the earth's crust through which lava, steam, and ashes are released
  2. 4. the solid outer layer of the Earth above the asthenosphere
  3. 5. violent shaking of the Earth's crust that may cause destruction
  4. 6. boundary A tectonic boundary where two plates are moving toward each other.
  5. 8. tectonics theory that earths lithospehre is divided into 12 plates
  6. 9. tectonic boundary where two plates are moving away from each other
  7. 10. of Fire The large series of volcanoes (some active) encircling the Pacific Ocean
Down
  1. 1. the study of the structure of the Earth or another planet, especially its rocks, soil, and minerals, and its history and origins
  2. 3. a weak zone in the upper part of the Earth's mantle
  3. 7. an idea of or belief about something arrived at through speculation