Across
- 2. nickel and iron composition
- 4. granite or basalt outermost earth layer
- 5. middle behavioral layer,
- 8. giant seawave from underwater earthquake
- 9. density of new, hot lithosphere
- 11. liquid metal circulates here
- 12. old, cold, dense basalt subducts here
- 14. plastic "lubricating" layer that flows slowly
- 15. dense seafloor lithosphere sinks into earth
- 18. ocean buoys that alert of tsunami
- 19. density of old, cold lithosphere
- 20. comprises the tectonic plates
Down
- 1. solid because expansion is not possible
- 3. "circle" with many earthquakes and volcanoes
- 5. exhibits radioactive decay and convection
- 6. crust plus uppermost mantle
- 7. mass per unit volume
- 10. where new, hot, buoyant basalt forms
- 13. plate tectonics mechanism
- 16. ocean in which 2004 tsunami occurred
- 17. plate tectonics driving force