Plates

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

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