Big Geosphere

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Across
  1. 4. Thinner and more dense crust
  2. 7. a geohazard that happens if a volcanic eruption melts snow that mixes with ash
  3. 8. a type of boundary where plates move away
  4. 10. these in the mantle move tectonic plates
  5. 12. created when two oceanic plates move apart
  6. 13. Type of crust that is thicker and less dense
Down
  1. 1. When a denser plate sinks under a less dense plate
  2. 2. at this type of boundary, plates collide
  3. 3. if there is more of this then magma has a higher viscosity
  4. 5. the name of the wave that moves slower and has a side to side motion
  5. 6. the supercontinent proposed by Alfred Wegener
  6. 9. p waves have this type of motion
  7. 11. created at a subduction zone