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Volcanoes Section 3
Test Description: Practice questions on Volcanoes Section 3
Instructions: Answer all questions to get your test result.
1) The long tube in the ground that connects the magma chamber to Earth's surface is called the
A
vent
B
pipe
C
side vent
D
crater
2) What provides the force that causes magma to erupt to the surface?
A
the silica in the magma
B
gravity in the lithosphere
C
the density of the magma
D
dissolve gases trapped in the magma
3) If a volcano's magma is high in silica, the volcano will probably
A
erupt explosively
B
produce dark-colored lava
C
erupt quietly
D
remain dormant
4) Which of the following volcano hazards is made up of rocky particles about the size of a grain of sand?
A
pahoehoe
B
volcanic ash
C
volcanic cinders
D
volcanic bombs
5) The main hazard from a quiet volcanic eruption is
A
pyroclastic flows
B
geysers
C
lava flows
D
volcanic gases
6) Which type of rock would you expect to form as a result of an explosive eruption?
A
aa
B
pahoehoe
C
granite
D
pumice
7) What triggers the small earthquakes that occur around a volcanic eruption?
A
pyroclastic flow
B
cooling magma inside the crust
C
upward movement of magma
D
plate movements
8) A volcano that may erupt again at some time in the distant future is
A
explosive
B
active
C
extinct
D
dormant
9) If geologists detect many small earthquakes in the area near a volcano, what can they infer?
A
It is dormant
B
It is probably about to erupt
C
It is extinct
D
It is a good source of geothermal energy
10) An eruption of ash, cinders, bombs and gases from a volcano is called
A
aa
B
pahoehoe
C
pyroclastic flow
D
a quiet eruption
*select an answer for all questions
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