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1.
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(3 points) Factors that determine the violence of an eruption include:
(there can be more than one
answer - check all that apply)
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2.
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(1 point) Why is there more volcanic activity at spreading centers than any other place
on our planet?
a | Low SiO2 content of the
magma | d | all of these are
reasons | b | High temperature of the magma | e | none of these are reasons | c | Lower
pressure |
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3.
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(1 point) Why is there less volcanic activity at subduction zones than at spreading
centers?
a | High SiO2 content of the
magma | d | all of these are
reasons | b | Low temperature of the magma | e | none of these are reasons | c | Higher
pressure |
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4.
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(1 point) Some of the ways that volcanoes can cause damage include all of the following
except:
a | lava
flows | d | batholith
formation | b | gas release | e | nuée ardentes & lahars | c | ashfall and ash
flows |
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Match the type of volcano with
the correct definition below a | Shield Volcanoes | c | Composite Cone (Stratovolcano) | b | Cinder Cones | d | Calderas |
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5.
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(1 point) Most of the time, the only part of the volcano that is visible is a steep
walled depression at the summit formed by collapse. These volcanoes produce extremely explosive
eruptions.
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6.
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(1 point) Broad, slightly domed volcanoes that are primarily made of basaltic (fluid)
lava and are generally very large size.
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7.
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(1 point) Most are adjacent to the Pacific Ocean and are large in size. They are
composed of interbedded lavas and pyroclastics and produce explosive eruptions.
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8.
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(1 point) Built from ejected lava fragments and have a steep slope angle. They are
rather small size and frequently occur in groups
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