Across
- 6. movement of heat energy through space
- 7. hard outer layer
- 10. plates spread
- 11. crust and upper mantle
- 14. hot solid rock below crust
- 15. sideways and downward movement
- 16. underwater mountain system sea-floor-spreading
- 17. plats slide past each other
Down
- 1. movement of heat in liquids and gasses=warm rises,cool sinks
- 2. soft layer below lithosphere
- 3. long deep depressions in ocean floor
- 4. breaks in the crust where earthquakes occur
- 5. liquid and solid center
- 8. plates move together
- 9. original supercontinent
- 12. divergent boundary land
- 13. movement of heat from one solid object to another