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Volcanoes Section 2
Test Description: Practice questions for Volcanoes Section 2
Instructions: Answer all questions to get your test result.
1) The viscosity of magma depends upon its silica content and its
A
magnetism
B
pahoehoe
C
pyroclastic flow
D
temperature
2) Pahoehoe is
A
lava witha rough, chunky surface
B
fast-moving, hot lava
C
cooler, slow moving lava
D
volcanic ash
3) The major ingredient of magma is
A
dissolved gases
B
obsidian
C
pahoehoe
D
silica
4) Several kilometers from a volcano, a geologist observes an old lava flow made up of dark-colored basalt rock. The geologist can infer that the lava must have had
A
high silica content
B
high viscosity
C
medium viscosity
D
low viscosity
5) Which of the following helps to determine how easily magma flows?
A
the number of vents on the volcano
B
the amount of silica in the magma
C
the diameter of the pipe
D
the size of the crater
6) Viscosity increases as temperature
A
stays the same
B
increases
C
decrease
D
increases and decreases
7) The greater the viscosity of a liquid, the ___________ it flows.
A
slower
B
faster
C
farther
D
deeper
8) The resistance of a liquid to flowing is called _______.
A
pressure
B
aa
C
viscosity
D
silica
9) A quiet eruption may produce slow moving, cooler lava that hardens to form rough chunks called
A
cinders
B
ash
C
aa
D
pahoehoe
10) Magma flows easily when it is low in _________________.
A
pahoehoe
B
aa
C
silica
D
ash
*select an answer for all questions
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