Across
- 4. is as hot as the surface of the sun.
- 7. 9000 people died in this earthquake.
- 10. where most earthquakes occur.
- 11. the cloud that formes in the air after the volcano erupts.
- 12. the most volcanically active zone on earth.
Down
- 1. the result of sudden movement along fault lines.
- 2. this volcano erupted in 1980
- 3. the earth outer rocky layer.
- 5. a place which formed because of a volcanic explosion.
- 6. the worse the earthquake the higher this is.
- 8. the earth plate moves this many cm per year.
- 9. a vent on the side of the volcano.