Plate tectonics

3. Types of waves produced by an earthquake
6. Individual sections of the earths crust that fit together like a jigsaw puzzle
7. Molten rock under the earths surface
8. A plate boundary where two plates are moving towards each other
10. A volcano not currently erupting and not likely to in the future
11. The point at a converging boundary where one plate is pushed underneath the other
13. The formation of mid-ocean ridges underwater
15. The archeological find that showed the continents were once joined and lead scientists to the theory of continental drift
19. Instrument used to measure the magnitude of earthquakes

1. A long and high sea wave caused by tectonic activity
2. A plate boundary where two plates are moving away from each other
4. The surface of the earth broken up into tectonic plates
5. A volcano that is neither active or extinct
9. The supercontinent Australia was once a part of
12. A plate boundary where two plates are sliding past each other in opposite directions.
14. The section of the Earth's mantle which tectonic plates float on top of
16. Scale used to describe the magnitude of earthquakes
17. Where a tectonic plate is shifted up
18. Fine material thrown out of a volcano