Across
- 3. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
- 5. a long, seismically active submarine ridge system situated in the middle of an ocean b
- 6. a long, narrow ditch
- 7. current a current in a fluid that results from convection
Down
- 1. a boundary where plates move towards each other creating mountains
- 2. A boundary where plates move away from each other
- 4. formation The superheated magma rises through the mantle (yellow), melts the crust above (brown) and flows on to the surface forming a volcano