Earth and Space Summary

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Across
  1. 3. form the oceans, continents, and mountains.
  2. 5. A series of extremely long waves caused by a large and sudden displacement of the ocean
  3. 6. The large, basin-shaped crater at the top of a volcano
  4. 9. The upper layer of the earth's mantle
  5. 14. Supercontinent of the Northern Hemisphere
  6. 16. Ancient supercontinent.
  7. 18. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these
  8. 21. the fastest surface wave and have a side-to-side motion like a moving snake.
  9. 22. cracks in the earth's crust where movement occurs
  10. 25. A strike-slip fault occurring at the boundary between two plates
Down
  1. 1. Size of an earthquake
  2. 2. An instrument used to detect and measure the intensity of an earthquake
  3. 4. An open ended scale that measures earthquakes and starts at 0
  4. 7. The outermost layer of the Earth
  5. 8. Point within the earth where an earthquake starts
  6. 10. an example of longitudinal or compression waves
  7. 11. Point on the earth's crust where an earthquake starts
  8. 12. The term used to describe a volcano that is "sleeping"
  9. 13. The forces beneath the Earth which are so large that layers of rock bend and crumple without breaking.
  10. 15. A mild tremor preceding the violent shaking movement of an earthquake.
  11. 17. proposed "Continental Drift"
  12. 19. Fine particles of pulverised rock that are blown from an explosion vent.
  13. 20. Largest earthquake in a sequence
  14. 23. what magma, or molten rock, is called once it reaches the surface.
  15. 24. The most common type of rock formed from the cooling of lava