Volcano

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Across
  1. 3. A semi-solid, highly viscous layer in the Earth's upper mantle
  2. 5. The rigid, rocky outer layer of Earth
  3. 9. Formed from the cooling and solidification of magma
  4. 11. Relatively thin part of the earth's crust which underlies the ocean basins.
  5. 14. A destructive, rapidly moving avalanche of hot volcanic gas, ash, and rock debris
  6. 16. Where two or more tectonic plates collide
  7. 17. Held inside a chamber in a volcano
  8. 19. Thick part of the earth's crust
  9. 20. A large oceanic tectonic plate that lies beneath the Pacific Ocean
Down
  1. 1. Zone of intense seismic and volcanic activity that encircles the Pacific Ocean
  2. 2. Formed by volcanic activity, often near tectonic plate boundaries
  3. 4. Powder from a volcano/fire
  4. 6. Where tectonic plates meet
  5. 7. When oceanic and continental plate boundaries meet
  6. 8. Magma under this in the mantle
  7. 10. Giant mountain with magma
  8. 12. Landforms created by the eruption of molten rock (magma)
  9. 13. A sudden and violent shaking of the ground
  10. 15. A rapidly flowing mixture of volcanic debris, water, and sometimes ice
  11. 18. Magma outside of a volcano