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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