Geology

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Across
  1. 2. a deadly wave usually triggered by another natural disaster
  2. 5. warmer materials are less dense, and colder materials are more dense
  3. 12. directly above the focus
  4. 13. magma after being expelled from the earth
  5. 15. a rock formed in magma or lava
  6. 17. under lithosphere
  7. 18. there are seven big ones and many little ones
  8. 19. the scale that measure the severity of earthquakes
  9. 20. the wave that shakes the ground
  10. 21. supercontinent
Down
  1. 1. a rock that used to be a different kind of rock
  2. 3. below mantle
  3. 4. rigid part of the earth
  4. 6. the collision of the earth’s plates
  5. 7. centre of the earth
  6. 8. typically the first signal received from an earthquake
  7. 9. where an earthquake originates
  8. 10. records motion of ground during an earthquake
  9. 11. a fracture or zone of fractures in the earth
  10. 14. when plates move away from eachother
  11. 16. igneous rocks are formed from this