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Volcanoes 3
Test Description: Chapter 7 Review
Instructions: Answer all questions to get your test result.
1) The main hazard from a quiet volcanic eruption is
A
lava flows
B
geyers
C
pyroclastic flows
D
volcanic gases
2) If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?
A
It is a good source of geothermal energy.
B
It is extinct
C
It is probably about to erupt.
D
It is dormant.
3) Before lava reaches the surface, the molten material is called
A
magma
B
liquid fire
C
rock
D
volcanic ash
4) The major ingredient of magma is
A
dissolved gases
B
obsidian
C
pahoehoe
D
silica
5) Which of the following helps to determine how easily magma flows?
A
the amount of silica in the magma
B
the number of vents on the volcano
C
the diameter of the pipe
D
the size of the crater
6) What provides the force that causes magma to erupt to the surface?
A
the density of the magma
B
gravity in the lithosphere
C
dissolved gases trapped in the magma
D
the silica in the magma
7) What can be used to identify a substance or to predict how it will behave?
A
geothermal activity
B
viscosity
C
physical and chemical properties
D
stages of activity
8) Amass of rock formed when a large body of magma cools inside the crust is called a
A
lava platuau
B
batholith
C
neck
D
dike
9) Which of the following volcano hazards is make up of rocky particles about the size of a grain of sand?
A
volcanic bombs
B
volcanic ash
C
volcanic cinders
D
pahoehoe
10) All of the following are examples of physical properties EXCEPT
A
ability to burn
B
density
C
melting point
D
hardness
*select an answer for all questions
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