Across
- 1. the point within the earth where an earthquake starts
- 5. a sudden and violent shaking of the ground
- 7. the inner-most layer of the earth
- 8. the rigid outer-part of the earth consisting of the crust and outer mantle
- 9. the study of how the earth's plates move
- 12. mountain or hill in which hot melted rock erupts
- 14. the upper layer of the earth's mantle that is below the lithosphere
- 16. a record produced by a seismograph
- 20. type of volcano that erupts for a short period of time; usually less than 1000 feet high
- 21. a scale used to measure the energy released by an earthquake
- 25. a push/pull wave that travels beneath the earth's surface; it is the fastest wave
- 26. slowest but most destructive wave that travels on the earth's surface
- 27. molten rock that is under the earth's surface
- 29. a crack in the earth's crust along which movement occurs
- 30. a type of plate boundary where the plates move away from each other
Down
- 2. a type of plate boundary where the plates move toward each other and collide
- 3. the point on the earth's surface directly above the focus of an earthquake
- 4. a scale used to measure the damage caused by an earthquake
- 6. the middle layer of the earth that is below the crust and above the core
- 10. a type of plate boundary where the plates rub against each other horizontally
- 11. the formation of new areas of oceanic crust
- 13. an up/down wave that travels beneath the earth's surface
- 15. Andreas Fault a major geological fault in California
- 17. the largest type of volcano; broad and slightly dome-shaped
- 18. type of volcano that switches between violent and gentle eruptions
- 19. an area in the Pacific Ocean where a large chain of earthquakes and volcanic eruptions occur
- 22. an instrument that measures force and duration of an earthquake
- 23. dust-like fragments blown from a volcano
- 24. the outer-most layer of the earth; it is the thinnest layer
- 28. molten rock that has erupted from a volcano