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