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Ch. 6 Volcano Test
Question | Answer |
---|---|
viscosity | a liquid's resistance to flow |
volcano made entirely of pyroclastic material | cinder cone |
volcano made entirely of lava | shield |
hot spot | mantle plume that forms volcanoes in the middle of tectonic plates |
when magma forms in the mantle | high temperature and low pressure |
plate tectonics | explains both mountain building and volcanoes |
dormant volcano | volcano that has erupted in the past, but not presently |
active volcano | volcano that is currently showing signs of erupting |
what type of eruption produces a pyroclastic flow | explosive |
where mid-ocean ridges are found | divergent boundaries |
thick magma has a _________ | high silica content |
another name for composite volcano | Stratovolcano |
type of eruption that would resemble a nuclear explosion | explosive eruption |
lava that forms under water | pillow lava |
lava that forms a brittle crust | aa |
pyroclastic material that is smallest in size | lapilli |
classification of pyroclastic material | size |
classification of lava | viscosity/consistency |
why magma rises | less dense than surrounding rock |
a deep crack | rift |
main vent | crater |
circular pit around a volcano | caldera |
nickname for Pacific plate | Ring of Fire |
tiltmeter | measures the slope of a volcano |
column of rising hot ash, debris, gases | occurs during an explosive eruption |