Volcanic

1. repeated eruptions of lava or pyroclastic material eventually build a mountain called a volcano
4. volcanic hazards
6. produced by the accumulation of fluid basaltic lavas
8. an opening in the surface of a volcano
10. particles produced in eruptions
12. first volcanic hazard
13. -cinder-cones-and-composite-cones three main volcanic types
14. occurs when water soaked volcanic ash and rock slide downhill
15. pressure drops enough for ____ to occur
17. depends on types of eruptions volcanoes can produce _____ ____ ____
19. eject lava fragments that harden in the air build
20. long belt of volcanoes in pacific ocean
21. are large nearly symmetrical volcanic mountains

2. determine weather the volcano erupts explosively or quietly
3. most volcanoes form here
5. substance resistance to flow.
7. Volcanic landforms
9. volcanic activity that occurs within a plate
11. what is the liquid in a volcano
16. is a landform made of magma that hardened in a volcanic pipe and later exposed to erosion
18. the summit of many volcanoes is a steep-walled depression