Across
- 4. to come together to form a boundary
- 6. break or separation caused by plate tectonics
- 9. movement of a fluid from different densities
- 10. to move apart to form a boundary
Down
- 1. when a piece of crust sinks other another
- 2. old crust from a plate is pushed under another
- 3. lava before it reaches the earth's surface
- 5. slide against each other to form a boundary
- 7. also referred to as the lithosphere
- 8. the outer layer of earth