Across
- 4. drift continents slowly moved over earth's surface
- 6. trench deep water canyons
- 7. boundary plates move apart or diverge from each other at?
- 10. valley pieces of earths crust diverge on land and a deep valley call forms
- 12. ocean floor sinks beneath the deep ocean trench
- 14. breaks in earth's crust where rocks have slipped past each other
- 15. a scientist that is curious about continents
Down
- 1. ridge seams that formed mountain ranges
- 2. continents that join together as a super continent or singe land mass.
- 3. boundary plates that come together or converge
- 5. floor spreading forms along with a crack in the oceanic crust
- 8. boundary plates that slip past each other
- 9. any trace of an ancient organism that has turned into a rock.
- 11. tectonics the theory of plate tectonics states that earth's plates are in slow constant motion driven by convection currents in the mantel
- 13. a device that uses sound waves to measure distance to an object