Across
- 4. relating to the structure of the earth's crust and the large-scale processes which take place within it.
- 5. plates that move towards each other
- 7. crust that doesn't sink or be destroyed
- 9. crust which can not be created or destroyed
- 10. a type of seismic wave which is longitudinal and faster
Down
- 1. a place with a lot of volcanic activity, no plate boundary's
- 2. The theory that the earth's crust is broken into about 10 fragments (plates,) which move in relation to one another, shifting continents, forming new ocean crust, and stimulating volcanic eruptions.
- 3. plates that moves away from each other
- 6. a type of seismic wave which is transverse and slower
- 8. plates that slide past each other