DISASTERS

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Across
  1. 3. earth's upper layer
  2. 5. earthquakes can be detected using this
  3. 6. these are constantly moving in the crust
  4. 7. hot, molten centre of the Earth
Down
  1. 1. tidal waves
  2. 2. this occurs when rivers overflow
  3. 3. heavy rains cause this
  4. 4. crop failure leads to this