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