Across
- 4. an oceanic tectonic plate that lies beneath the Pacific Ocean
- 6. the sudden release of strain energy in the Earth's crust, resulting in waves of shaking that radiate outwards from the earthquake source.
- 7. This occurs when plates move towards each other and collide.
- 10. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 11. a hot or cold mixture of water and rock fragments that flows down the slopes of a volcano and typically enters a river valley.
- 13. Mount St. Helens, Mount Fuji, and Ol Doinyo Lengai.
- 15. the part of the Earth's crust that makes up the seafloor
- 16. the sudden release of strain energy in the Earth's crust, resulting in waves of shaking that radiate outwards from the earthquake source.
- 18. zone of Earth's mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere
Down
- 1. A hot area in the asthenosphere that creates volcanic islands
- 2. the solid, outer part of Earth.
- 3. a dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed.
- 4. The location where two plates meet
- 5. the relatively thick part of the earth's crust that forms the large landmasses
- 8. a mountain or hill having a vent through which lava, hot vapor, and gases have been erupted
- 9. hot melted rock belowground
- 12. a string of underwater volcanoes and earthquake sites around the edges of the Pacific Ocean
- 13. a large volcano that has erupted on the seafloor and has emerged above sea level, occurring in ocean basins or on ocean ridges.
- 14. hot melted rock aboveground
- 17. form when hot, molten rock crystallizes and solidifies