Across
- 3. underwater mountain ranges
- 5. trace of ancient organism preserved in rock
- 11. theory that states earth's plates are in constant motion
- 12. boundary where plates converge
- 13. boundary where plates diverge
Down
- 1. where pieces of earth's crust diverge on land
- 2. supercontinent name
- 4. underwater canyons
- 6. process adding new material to ocean floor
- 7. ocean floor sinks back into mantle
- 8. boundary where plates slip past each other
- 9. Wegener's hypothesis
- 10. breaks in earth's crust