Across
- 4. plates where do volcanoes form
- 7. each cycle of spreading and intrusion of magma during seafloor spreading results in
- 9. which volcanoes are the most explosive
- 12. boundaries what form(s) where the plates move apart
- 13. what is oceanic crust made of
- 15. found at divergent boundaries
- 16. driving forces of tectonic plates are related
Down
- 1. difference in travel times between P- and S- waves
- 2. compared to ocean crust
- 3. subdustion results in the formation
- 5. many early mapmakers thought Earth's continents had moved based on
- 6. top or side of volcano collapses
- 8. which boundary is crust neither destroy nor form along
- 10. continental-continental plate collisions produce
- 11. how much of earth surface
- 14. Volcanoes that form far from plates