Across
- 3. layer of rock that forms the Earth's surface
- 4. landmasses surrounded by oceans
- 7. the process that molten material adds new oceanic crust to the ocean floor.
- 9. Deep valleys along the ocean floor through which oceanic crust slowly sinks towards the mantle.
- 10. Places where two or more plates meet.
- 11. scientist that made the theory
Down
- 1. The soft layer of the mantle on which the lithosphere forms.
- 2. A rigid layer made up of the uppermost part of the mangle and the crust.
- 5. process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
- 6. rock that is so hot it has become fluid.
- 8. The study of planet Earth.
- 10. The name of the single landmass that broke apart 200 million years ago and is now today's continents.