Across
- 1. process where earth's crust goes into the mantle
- 5. the borders of the plates are called ______
- 6. plate boundary that moves apart
- 8. the bottom of the sea
Down
- 2. a long narrow ditch on the seafloor
- 3. plate boundary that moves away
- 4. plate boundary that grinds past each other.
- 7. the process where earth's surface changes