Volcano Puzzle

2. An oceanic tectonic plate that lies beneath the Pacific Ocean.
4. The upper layer of the earth's mantle, below the lithosphere.
8. Coming closer together, especially in characteristics or ideas.
10. An island of volcanic origin.
13. A fast-moving current of hot gas and volcanic matter that flows along the ground away from a volcano.
15. A destructive mudflow on the slopes of a volcano.
18. A sudden and violent shaking of the ground, sometimes causing great destruction.
19. Change of motion of one lithospheric plate relative to the adjacent lithospheric plate.

1. The relatively thin part of the earth's crust which underlies the ocean basins.
3. The powdery residue left after the burning of a substance.
5. The outermost layer of Earth's lithosphere that makes up the planet's continents.
6. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
7. A mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
9. Hot fluid or semifluid material below or within the earth's crust.
10. A special class of mountains.
11. A tectonic belt of volcanoes and earthquakes.
12. Hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
14. The rigid outer part of the earth, consisting of the crust and upper mantle.
16. Formed from the cooling and solidification of molten (melted) rock.
17. A small area or region with a relatively hot temperature in comparison to its surroundings.