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