Across
- 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
Down
- 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