plate tectonic

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Across
  1. 2. magma once it has erupted onto the earths surface.
  2. 3. a vent in the surface of earth through which nagma erupts.
  3. 4. a weak point in the earths crust.
  4. 5. used to measure the strength of an earthquake.
  5. 9. a region in which earthquakes.
  6. 10. the place where two or more plates in the earth crust meet.
  7. 11. the maximum height of a wave crest or depth of a trough.
  8. 14. an isstrument that records the motions of the earth.
  9. 17. earthquake activity.
  10. 19. the opening of the earth.
Down
  1. 1. a measure of the strength of an earthquake.
  2. 6. the innermost layers of the earth.
  3. 7. a scientist who studies earthquakes.
  4. 8. huge sea waves caused by earthquake.
  5. 10. huge section which makes up the earths crust.
  6. 12. movement of soil and rock downhill
  7. 13. the point on the earths surface.
  8. 15. shaking of the earth.
  9. 16. volcanic rock.
  10. 18. the thin outer layer of the earths surface.