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