Plate Tectonics

1. very hot rock
4. that carry energy
6. boundary- Two plates divide
9. drift- Wegener's idea that the continents moved over the surface of earth
11. core- molten metal covering the inner core
13. valley- deep valley
16. transferred by motion of a liquid
17. ancient thing that is preserved in rock
18. spreading- where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge Deep-ocean trench- long, narrow, steep-sided depression in the ocean bottom

2. boundaries- Two plates slide past each other
3. All the contents that were together
5. soft layer
7. Heat transferred by touching
8. tectonics-a theory explaining the structure of the earth's crust convergent boundary- Two plates collide
10. core- ball of solid mental
12. ridge- seams that form mountains that are in the middle of the ocean floor
14. top of mantle into a single layer
15. break in the crust were they slipped