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1. |
Which of the following were
precursor events to the 1980 eruption of Mt. St. Helens? |
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a) |
steam eruptions |
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b) |
earthquakes |
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c) |
bulge of volcano's flank |
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d) |
fissure development |
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e) |
all the above |
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2. |
Death came quickly to the
residents of _______ who were encouraged to stay in the town
to vote in an upcoming election. |
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a) |
Armero |
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b) |
St. Pierre |
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c) |
Nyos village |
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d) |
Paricutin village |
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e) |
Spirit Lake |
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3. |
Which of the following is
not a stratovolcano? |
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a) |
Mt. St. Helens |
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b) |
Mt. Pelee |
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c) |
Paricutin |
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d) |
Nevado del Ruiz |
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e) |
all are stratovolcanoes |
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4. |
Which of the following is
the correct sequence of events for the 1980 eruption of Mt. St.
Helens? |
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a) |
earthquake, vertical blast, landslide, lateral blast |
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b) |
landslide, earthquake, vertical blast, lateral blast |
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c) |
earthquake, lateral blast, landslide, vertical blast |
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d) |
lateral blast, earthquake, vertical blast, landslide |
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e) |
earthquake, landslide, lateral blast, vertical blast |
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5. |
The gaseous cloud that killed
over 1700 people at Lake Nyos was composed of _______. |
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a) |
SO2 |
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b) |
Cl2 |
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c) |
HF |
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d) |
H2S |
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e) |
CO2 |
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6. |
In 1902, about 28,000 residents
of St. Pierre, on the island of Martinique, died from ____________. |
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a) |
a lahar |
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b) |
a pyroclastic flow |
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c) |
an earthquake |
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d) |
a base surge |
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e) |
Plinian airfall |
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7. |
The young village of Armero
was built directly on top of a(n) ____________ deposit that erupted
from Nevado del Ruiz in 1845. |
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a) |
pyroclastic flow |
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b) |
Plinian airfall |
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c) |
andesitic lava flow |
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d) |
lahar |
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e) |
landslide |
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8. |
The lava dome that rose out
of the Etang Sec crater after the 1902 eruption of Mt. Pelee
(picture) became known as _________. |
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a) |
the Spine of St. Pierre |
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b) |
Devil's Tower |
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c) |
Rooster Rock |
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d) |
Dante's Peak |
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e) |
the Tower of Pelee |
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9. |
The root cause for the 1980
eruption of Mt. St. Helens was ________. |
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a) |
subduction |
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b) |
a mantle plume |
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c) |
continental rifting |
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d) |
fissure eruption |
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e) |
none of the above |
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10. |
The Lake Nyos crater (picture)
is in reality a ________. |
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a) |
caldera |
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b) |
stratovolcano summit crater |
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c) |
tuff ring |
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d) |
maar |
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e) |
pit crater |
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