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