Crew Severin - Layers of the Earth and Plate Tectonics

1. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
3. A dropped zone where the plates are pulling apart
4. Layer of the crust that is broken up into tectonic plates
5. Theory created by Alfred Wegner that states that all 8 continents (including India) were once connected in one large supercontinent
6. Type of rock that continental plates are made from
8. An arch shaped chain of volcanoes formed above a subduction zone
11. A molten mixture of rock-forming substances, gases, and water from the mantle
16. A dense sphere of solid iron and nickel at the center of Earth
17. The process by which molten material adds new oceanic crust to the ocean floor
20. A plate boundary where two plate move toward each other
21. A layer of molten iron and nickel that surrounds the inner core of Earth
22. An undersea valley that represents one of the deepest parts of the ocean
23. The study of Earth's magnetic polarity, as recorded in rocks that are high in iron
24. The layer of rock that forms Earth's outer surface

1. Vibrations that travel through Earth carrying the energy released during an earthquake
2. An undersea mountain chain where new ocean floor is produced; a divergent boundary plate boundary under the ocean
7. A plate boundary where two plates move past each other in opposite directions
9. Force that drives the movement of tectonic plates on Earth
10. The layer of hot, solid material between Earth's crust and core
12. The shaking that results from the movement of rock beneath Earth's surface
13. The phenomenon where Earth's magnetic field flips
14. The type of rock that oceanic plates are made from
15. A plate boundary where two plate move away from each other
18. The slowly moving, semi-molten layer of the upper mantle
19. Scientist who developed the theory of Continental Drift