Across
- 3. One plate subducted under the other
- 4. Seafloor
- 6. Iron-rich, under extremely high temp. and pressure
- 9. Hydrothermal vent
- 12. Surrounds the planet
- 13. Cracks in the earths surface
- 14. Two plates separating
Down
- 1. Crust + uppermost mantle
- 2. Two plates sliding
- 4. Upper mantle
- 5. Near melting point of rock; semi-plastic
- 7. Iron and nickel
- 8. Sinking of a plate
- 10. Collision of plates
- 11. Continous chain of volcanic mountains