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Volcanoes 2
Test Description: Chapter 7 Review 2
Instructions: Answer all questions to get your test result.
1) When ash, cinders, and bombs build up in a steep pile around a volcano's vent, the result is a
A
dormant volcano.
B
composite volcano.
C
cinder cone volcano.
D
sheild volcano.
2) When groundwater heated by magma rises to the surface and collects in a natural pool, it is called a
A
pyroclastic flow.
B
vent.
C
hot spring.
D
geyser.
3) The huge hole left by the collapse of a volcanic mountain is called a
A
caldera.
B
sheild volcano.
C
cinder cone.
D
lava plateau.
4) Several kilometers froma volcano, a geologist observes an old lava flow made up of dark-colored basalt rock. The geologist infers that the lava must have had
A
high viscosity.
B
medium viscosity.
C
high silica content.
D
low viscosity.
5) When many layers of thin, runny lava build up a high, level aera, the result is a
A
composite volcano.
B
cinder cone volcano.
C
sheild volcano.
D
lava plateau.
6) What triggers the small earthquakes that occur around a volcano before an eruption?
A
cooling magma inside the crust
B
plate movements
C
upward movement of magma
D
pyroclastic flow
7) When magma hardens in a volcano's pipe, the result will eventually be a landform called a
A
volcanic neck.
B
batholith.
C
dike.
D
sill.
8) Pahoehoe is
A
cooler, slower-moving lava.
B
volcanic ash.
C
fast-moving, hot lava.
D
lava with a rough, chunky surface.
9) What is the landform that forms when a mass of hardened magma is uplifted, causing the layers of rock to bend upward?
A
lava plateau
B
dome mountain
C
dike
D
volcanic neck
10) If a volcano's magma is high in silica, the volcano will probably
A
erupt explosively.
B
remain dormant.
C
produce dark-colored lava.
D
erupt quietly.
*select an answer for all questions
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