Across
- 3. very hot rock
- 7. Heat transferred by touching
- 9. ancient thing that is preserved in rock
- 10. valley- deep valley
- 13. top of mantle into a single layer
- 15. transferred by motion of a liquid
- 16. boundary- Two plates divide
- 17. 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
Down
- 1. break in the crust were they slipped
- 2. soft layer
- 4. boundaries- Two plates slide past each other
- 5. that carry energy
- 6. drift- Wegener's idea that the continents moved over the surface of earth
- 8. ridge- seams that form mountains that are in the middle of the ocean floor
- 11. tectonics-a theory explaining the structure of the earth's crust convergent boundary- Two plates collide
- 12. All the contents that were together
- 14. core- ball of solid mental
- 18. core- molten metal covering the inner core