Natural Phenomena

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Across
  1. 4. Caused by movement of tectonic plates
  2. 5. The moon turns red when this happens
  3. 8. Unstable ground collapsing
Down
  1. 1. Scale used to measure earthquakes
  2. 2. Destructive waves
  3. 3. Molten rock
  4. 6. A fast moving flood
  5. 7. There are 4 _____