Moving continants

1. arc a curved line of volcanoes that forms parallel to a plate boundary.
5. drifted slowly to their current positions.
7. Has a trunk
8. Likes to chase mice
11. a crack or a fracture in Earth’s lithosphere along which movement
14. 200 million years ago.
15. the process that occurs when one tectonic plate moves under
17. boundary the boundary between two plates that move away from each other.
20. zone an area of many fractured pieces of crust along a large fault.
22. a vent in Earth's crust through which molten rock flows.
23. a break or a crack in Earth’s crust.
24. ridge long, narrow mountain range on the ocean floor; formed by magma
29. drift Wegener’s hypothesis that all continents were once connected in a
31. vibrations caused by the rupture and sudden movement of rocks
32. spreading the process by which new oceanic crust forms along a mid-ocean
34. and older oceanic crust moves away from the ridge.
35. trench a deep, underwater trough created by one plate subducting under

2. crater a round depression formed on the surface of a planet, moon, or
3. Large marsupial
4. magma that erupts onto Earth's surface.
6. tectonics theory that Earth’s surface is broken into large, rigid pieces that
9. boundary the boundary between two plates that slide past each other.
10. rapid, downhill movement of soil, loose rocks, and boulders.
12. plate at a convergent plate boundary.
13. divergent plate boundaries.
16. Flying mammal
18. Man's best friend
19. molten rock stored below Earth's surface.
21. a wave that forms when an ocean disturbance suddenly moves a
24. with respect to each other.
25. given to a supercontinent that began to break apart
26. large landmass that broke apart about 200 million years ago
27. boundary the boundary between two plates that move toward each other.
28. space object by the impact of a meteorite.
30. volume of water.
33. tectonic plate.