plate tectonics

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

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.