MT. Pinatubo

4. a type of plate interaction where two plates run into each other
5. a part of the Earth's crust below the continents
8. an opening in Earth's crust through which lava, ash, and gases erupt
11. a volcano formed as an island from a hot spot
14. a mountain with a large, circular hole at the top through which lava gases, steam, and dust are or have been forced out
16. a mixture of rock, mineral, and glass particles expelled from a volcano during a volcanic eruption
17. belt like region, roughly surrounding the Pacific Ocean, characterized by frequent volcanic and earthquake activity
18. hot molten rock above Earth's surface
19. an oceanic tectonic plate that lies beneath the Pacific Ocean

1. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
2. the middle layer of the earth's mantle
3. a part of the Earth's crust below the ocean
6. a dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed
7. formed when hot molten rock crystallizes and solidifies
9. destructive mudflow
10. a sudden and violent shaking of the ground as a result of movements within the earth's crust or volcanic action
12. the rigid outer part of the earth, consisting of the crust and upper mantle
13. a stationary area in the Earth's mantle that gives rise to a plume of hot material, which can create volcanoes
15. hot molten rock below Earth's surface
20. the location where two plates meet