Chapter 3 Vocabulary Game

3. A deep valley that forms where two plates move apart
4. A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
7. The hypothesis that the continents slowly move across the Earth's surface.
8. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
10. The process by which molten material adds new oceanic crust to the ocean floor.
11. A plate boundary where two plates move past each other in opposite directions.
14. A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.

1. Preserved remains or traces of an organism that lived in the past.
2. The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
5. An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
6. A plate boundary where two plate move toward each other.
9. A plate boundary where two plates move away from each other.
12. A break in Earth's crust along which rocks move.
13. The name of the single landmass that began to break apart 200 million years ago and gave rise to today's continents.