Form 4 - Tectonics

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Across
  1. 1. Molten rock on the suface
  2. 3. The line of weakness that ruptures during an earthquake
  3. 7. This disease was a secondary impact following the Haiti Earthquake.
  4. 9. _____ Waves. The ‘ripple’ of energy through the ground following an earthquake.
  5. 11. The point on the earth’s surface above the earthquake rupture.
  6. 13. When the ground behaves like a fluid during an earthquake.
  7. 15. Smaller earthquakes that follow the main one.
  8. 18. The outer layer of the earth.
  9. 21. _____-____ Ridge. The spreading locations at a constructive plate boundary.
  10. 22. ___ Valley. The start of two plates being pulled apart.
  11. 23. The point at which an earthquake occurs
Down
  1. 2. A long tube that allows magma to escape towards the surface
  2. 4. A river of ash that can occur following a volcanic eruption.
  3. 5. This type of crust is thick, old and has a low density.
  4. 6. Volcano with lava of a low viscosity.
  5. 7. When two plates move past each other along a plate boundary.
  6. 8. ______ Zone. 2 Continental crusts moving towards each other.
  7. 10. A volcano that has erupted recently and is likely to erupt again.
  8. 12. One of the metals that the core is made of.
  9. 14. Magma _______. An underground store of magma.
  10. 16. _________ Zone. Where one plate is forced underneath another.
  11. 17. Volcano with alternate layers of ash and lava
  12. 19. _____ Mountains. When sediment is squeezed together and uplift to form mountain ranges.
  13. 20. _____ Plate. The oceanic plate found to the East of NZ.