Plate Tectonics Crossword
Across
- 2. an undersea mountain chain where new ocean floor is produced; a divergent plate boundary under the ocean.
- 3. a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
- 7. a break in Earth’s crust along which rocks move.
- 8. a plate boundary where two plates move away from each other.
- 10. the hypothesis that the continents slowly move across Earth’s surface.
- 12. the theory that pieces of earth’s lithosphere are constantly moving, driven by convection currents in the mantle.
- 13. the preserved remains or traces of an organism that lived in the past.
- 14. boundary- a plate boundary where two plates move past each other in opposite directions.
Down
- 1. the process by which molten material adds new oceanic crust to the ocean floor
- 4. a plate boundary where two plates move towards each other.
- 5. a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
- 6. the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent boundary.
- 9. the name of the single landmass that began to break apart 200 million years ago and gave rise to today’s continents.
- 11. a deep valley that forms where two plates move apart.