Across
- 3. a powdery residue left after the burning of a substance
- 5. fire-born
- 6. a long horseshoe-shaped seismically active belt of earthquake epicenters, volcanoes, and tectonic plate boundaries that fringes the Pacific basin
- 9. a specific area where two tectonic plates meet
- 10. a special class of mountains
- 11. a large hole of hot magma rising from deep within the Earth
- 12. Molten rock that is below the earth's surface
- 13. a relatively thin part of the earth's crust which underlies the ocean basins
- 16. a large volcano that erupted on the seafloor & emerged above sea level, occurring in ocean basins or ocean ridges
- 17. a destructive mudflow on the slopes of a volcano
- 18. the rigid outer part of the earth that is found in the crust & upper mantle of earth
- 19. a vent in the earth's crust were lava, ash & gases escape
Down
- 1. an oceanic tectonic plate that lies beneath the Pacific Ocean
- 2. when an oceanic plate runs into a continental plate & slides beneath it
- 4. the upper layer of the earth's mantle that is below the lithosphere
- 7. a destructive dense mass of very hot ash, lava fragments & gases that are ejected explosively from a volcano & flow downslope of great speed
- 8. a thick part of the earth's crust that forms large landmasses its way older & more complex than the oceanic crust
- 14. when plates move towards each other & collide
- 15. a sudden motion or trembling in the earth caused by the release of slowly accumulated energy
- 17. a hot molten or semifluid rock erupted from a volcano