Volcanoes: Question Preview (ID: 22913)


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Which of the following does not affect viscosity?
a) Location
b) Temperature
c) Silica content
d) Amount of gasses

Mafic magma has a low viscosity
a) True
b) False
c)
d)

Felsic magma has a low viscosity
a) False
b) True
c)
d)

Which of the following liquids has the highest viscosity?
a) Molasses
b) Water
c) Honey
d) Olive oil

Which type of magma will erupt most violently?
a) Felsic
b) Mafic
c) Basaltic
d) Intermediate

Which of the following types of lave is NOT basaltic?
a) Scoria
b) Aa
c) Pahoehoe
d) Pillow basalt

Which type of volcano has steep sides and erupts both mafic and felsic magma?
a) Composite volcano (stratovolcano)
b) Shield volcano
c) Caldera
d) Cinder cone

Which type of volcano is composed entirely of pyroclastic material?
a) Cinder cone
b) Composite volcano (stratovolcano)
c) Caldera
d) Shield volcano

What type of volcano has gently sloping sides and erupts mafic magma?
a) Shield volcano
b) Composite volcano (stratovolcano)
c) Cinder cone
d) Caldera

Pyroclastic flows move incredibly fast because the gasses from the eruption reduce friction on the ground
a) True
b) False
c)
d)

Lahars are composed of large pieces of pyroclastic material
a) False
b) True
c)
d)

Ash clouds can makd air travel unsafe
a) True
b) False
c)
d)

Which of the following is NOT true of hot spots?
a) They create convection cells
b) They are stationary
c) They can be used to determine the direction a plate is moving
d) They are also called mantle plumes

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