Higher silica content in magma, geology homework help

Higher silica content in magma can lead to a more violent eruption for a volcano.

Select one:

a. True

b. False

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Yellowstone and the Hawaiian Islands are both the result of hotspot volcanism.

Select one:

a. True

b. False

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Mount St. Helens in Washington state represents which type of volcano?

Select one:

a. Stratovolcano/Composite Cone

b. Cinder Cone

c. Shield Volcano

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Cinder cones are the result of:

Select one:

a. Hawaiian eruptions

b. Strombolian eruptions

c. Vulcanian eruptions

d. Plinian eruptions

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Cinder cones are made up from lava that was:

Select one:

a. Hot and felsic

b. Cold and felsic

c. Cold and mafic

d. Hot and mafic

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Which volcano type from the choices below can experience a Plinean eruption?

Select one:

a. Stratovolcano/Composite Cone

b. Cinder cone

c. Shield Volcano

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When hiking up most stratovolcanoes, which rock composition(s) will you see from its base to its summit?

Select one:

a. Felsic at the bottom, intermediate in the middle, and mafic at the top

b. Mafic at the bottom, intermediate in the middle, and felsic at the top

c. Intermediate from bottom to top

d. Felsic from bottom to top

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Which volcano type can have mafic lava as part of its composition?

Select one:

a. Shield volcanoes

b. Cinder cones

c. Stratovolcanoes

d. All of the above

e. Only “a” and “b”

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Shield volcanoes are:

Select one:

a. Made up of felsic magma

b. Are the largest volcanoes on the planet

c. Are made up from colder lava flows

d. Only “a” and “c”

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Cinder cones have steep sides because:

Select one:

a. Of the high viscosity of the lava.

b. Of the mafic composition.

c. It’s a pile of cinders.