Across
- 2. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent boundary.
- 5. the single land mass that was once considered a super continent millions of years ago
- 8. The idea that the continents were once joined together to form a single large continent, which over time broke up and slowly moved great distances apart.
- 9. A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
- 10. The molten mixture of rock-forming substances, gasses, and water from the mantle.
- 11. A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
Down
- 1. plate boundary where two plates move past each other in opposite directions.
- 3. A plate boundary where two plates move away from each other
- 4. An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
- 6. A plate boundary where two plates move toward each other.
- 7. The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle