Across
- 4. a break apart through faulting caused by plate tectonics
- 6. a current in the fluid that results in convection
- 7. a long narrow ditch
- 8. the process that destroys old lithosphere
- 9. molten natural material which all igneous rocks are from
Down
- 1. a rupture in the crust of a planetary
- 2. earths thin outer shell broken into big pieces
- 3. when two plates collide
- 5. when two plates slide