ScienceEarth ScienceChapter 6: What Is A Volcano Anyway?
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Chapter 6: What Is A Volcano Anyway?

Francesco Alexander avatar Francesco Alexander
24 July 2022
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17 test answers

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question
Which of the following volcanoes is generally the largest?
answer
shield volcano
question
Huge circular depressions from which volcanoes erupt are called:
answer
calderas
question
Which of the following are erupted by volcanoes?
answer
all of these
question
Which of the following materials is NOT produced by erupting volcanoes?
answer
sandstone
question
Which of the following are ways that viscosity affects gases in magma?
answer
Viscous magma prevents gas from escaping easily.
question
Which of the following are differences between an eruption column and pyroclastic flow?
answer
A pyroclastic flow forms when the gas flux cannot support the column.
question
A single volcano may produce:
answer
Both explosive and nonexplosive eruptions
question
The higher the gas pressure builds in a magma,:
answer
the more explosive an eruptions it is likely to produce
question
Which of the following are true of felsic magmas?
answer
all of these
question
Which of the following is common in lava flows associated with scoria cones?
answer
Some scoria cones are not accompanied by a lava flow and vice versa.
question
Which of the following is NOT true of basaltic lava flows?
answer
They pile up in steep, cone-shaped hills
question
Which of the following is NOT true about shield volcanoes in the landscape?
answer
They are large mountains with steep slopes.
question
Shield volcanoes commonly have:
answer
all of these
question
Shield volcanoes commonly involve:
answer
fluid lava flows
question
Flood basalts influence life on Earth because:
answer
all of these
question
What is the interpreted origin for magma that forms flood basalts?
answer
a rising mantle plume
question
According to the fossil record, what events have coincided with the approximate times when flood basalts were erupting?
answer
mass extinction