Across
- 4. lava type that is silica rich and often moves too slow to see
- 8. occurs when water-soaked volcanic ash and rock slide rapidly downhill
- 9. broad and small slopes
- 10. substance's resistance to flow
- 12. what provides the force to propel lava out of the vent
- 13. lava type that is very fluid and less viscous
- 14. small volcanoes built from pyroclastic material
- 16. a depression in a volcanic mountain
- 18. landform produced by repeated eruptions of very fluid, basaltic lava
- 20. volcanic activity that occurs within a plate
Down
- 1. the long belt of volcanoes that circles much of the Pacific Ocean
- 2. steep walled depression on top of volcano
- 3. small volcanic region a few hundred kilometers across
- 5. particles produced in volcanic eruptions
- 6. landform made of magma that hardened in a volcano's pipe
- 7. type of basaltic lava that is cooler and slower moving
- 11. type of basaltic lava that is hotter, and faster moving
- 15. what forms in the crust and upper mantle when solid rock partially melts
- 17. boundaries where volcanic activity occurs when plates pull apart
- 19. an opening to the surface