SeaFloor Spreading & Plate Tectonics

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Across
  1. 4. An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
  2. 8. A plate boundary where two plates move toward each other.
  3. 9. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
  4. 10. Geologist that suggested continental drift.
  5. 12. A deep valley that forms where two plates move apart.
Down
  1. 1. The process by which molten material adds new oceanic crust to the ocean floor.
  2. 2. One of the huge broken pieces of the Earth's lithosphere.
  3. 3. Geologist that discovered the processes of Seafloor Spreading and subduction.
  4. 5. A plate boundary where two plates move away from each other.
  5. 6. The hypothesis that the continents slowly move across Earth's surface.
  6. 7. A plate boundary where two plates move past each other in opposite directions.
  7. 11. The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.