Natural Hazards

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Across
  1. 3. A volcanic flow that is fast and deadly
  2. 4. The same as lava, but underground
  3. 8. The point on the Earth's surface that is hit hardest by an earthquake
Down
  1. 1. An explosive mountain
  2. 2. A violent shaking of the Earth's crust
  3. 5. A scale used to measure earthquake strength
  4. 6. The thickest layer of the Earth
  5. 7. A short way of saying 'poor countries'