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