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