Across
- 3. volcanos that have not erupted in a long time but are expected to erupt in the future
- 4. A moving fluid mass composed of volcanic debris and water
- 6. what happens when two blocks of the Earth slip past one another
- 8. The innermost layer of the Earth
- 10. one of the 6 or 7 great divisions of land on the globe
- 12. Three-dimentional surface or zone across which there is a significant change in the velocity
- 15. molten rock that issues from a volcano
- 16. A seafloor mountain system formed by plate tectonics
- 17. the action or process of eroding
- 18. A thin pasty suspension
- 20. the outside layer of the Earth and is made out of solid rock
Down
- 1. located between the inner core and the mantle
- 2. The action of the weather conditions
- 5. A fast moving current of hot gas and volcanic matter
- 7. German peophysicist who proposed the theory of the continental drift
- 9. the continental landmasses were drifting across the Earth
- 11. A vent in the crust of the Earth from which molten or hot rock and steam issue
- 13. a natural feature of a land surface
- 14. A hypothetical landmass near the end of the Paleozoic Era
- 19. between the crust and the core of the Earth
