Tectonic Activity

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Across
  1. 5. Plates that slide past each other.
  2. 7. The instrument that measures the motions of the ground.
  3. 10. A scale for measuring the effects of earthquakes.
  4. 12. Islands created by volcanoes.
  5. 14. When a more dense plate moves under a less dense plate.
  6. 15. Used to measure the power of an earthquake
  7. 17. Leaving home and moving to a safer location.
  8. 18. Can check any movement withing the rocks.
Down
  1. 1. A sudden violent shaking of the ground
  2. 2. Plates that move away from each other.
  3. 3. A measurement of the strength of an earthquake.
  4. 4. The location where the earthquake begins.
  5. 5. Movement withing the Earth, which moves tectonic plates.
  6. 6. A mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.
  7. 8. A volcanic center
  8. 9. These cause earthquakes and volcanoes.
  9. 11. Molten rock under the surface of the Earth.
  10. 13. Plates that move towards each other.
  11. 16. The point on the Earth's surface directly above the focus.
  12. 19. An Indonesian word for a rapidly flowing mixture of rock debris and water. Sometimes referred to as m mud flows.