Across
- 1. ball of hot solid metals
- 4. area of a volcanic activity
- 9. two plates converging together
- 10. thin layer of rock
- 13. system of rising cooling and sinking
- 14. two plates moving past each other in different directions
- 15. earths thickest layer
- 16. super continent
- 17. upper mantle
- 19. when plates move apart
Down
- 2. the plates drifted apart
- 3. layer of liquid that surrounds inner core
- 5. bottom part of mantle
- 6. the switch in direction of earths magnetic north and south poles
- 7. huge underwater mountain
- 8. earth crust and mantle combined
- 11. a gap that forms as plates move apart
- 12. a hypothesis made by alfred wegner
- 13. transfer of heat within a material
- 18. one plate sinking beneath another