chap 6
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School
Ivy Tech Community College, Indianapolis *
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Course
100
Subject
Geology
Date
Dec 6, 2023
Type
docx
Pages
6
Uploaded by GrandTitanium11150
Question 1
1 / 1 pts
Mt. Kilimanjaro is Earth’s largest shield volcano.
True
Correct!
False
Question 2
1 / 1 pts
Yellowstone National Park encompasses a volcanic caldera.
Correct!
True
False
Question 3
1 / 1 pts
Shield volcanos form from what type of magma?
high viscosity aa basalt magmas
Correct!
low viscosity basalt magmas
high viscosity rhyolite magmas
low viscosity rhyolite magmas
Question 4
1 / 1 pts
Eruptions of highly viscous lavas may produce explosive clouds of hot ash and gases
called eruption columns.
Correct!
True
False
Question 5
1 / 1 pts
Most magma originates deep within the Earth’s inner core.
True
Correct!
False
Question 6
1 / 1 pts
Volcanoes are not able to erupt on the ocean floor because of the extremely cold
temperatures at depth.
True
Correct!
False
Question 7
1 / 1 pts
________ are usually the most abundant gases emitted during basaltic volcanism.
Neon and ammonia
Oxygen and nitrogen
Chlorine and sodium
Correct!
Water and carbon dioxide
Question 8
1 / 1 pts
Which of the following is
not
a significant volcanic hazard?
injury or death by inhalation of air heavily laden with volcanic ash
Correct!
being overrun by a fast-moving aa lava flow
a tsunami generated by a massive submarine volcanic eruption
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being caught in a river valley and being overcome by a volcanic mudflow/lahar
Question 9
1 / 1 pts
Earth’s most potentially dangerous type of volcano is:
Correct!
Stratovolcano
Cinder cone
Shield
Question 10
1 / 1 pts
________ magma is the most abundant type of magma erupted on Earth.
Andesitic
Correct!
Basaltic
Granitic
Question 11
1 / 1 pts
Volcano A erupts rocks with SiO
2
content ranging from 49% to 52% whereas volcano B,
100km away, erupts materials with SiO
2
content of 62-68%. Which statement best
characterizes these two volcanos?
Both volcanos are shield type volcanos that are characterized by quiet eruptions.
Both volcanos are violent, explosive volcanos that spread ash continent wide.
Correct!
Volcano A is probably a shield volcano with typically quiet eruptions, whereas Volcano B
is likely a stratovolcano characterized by violent, explosive eruptions.
Question 12
1 / 1 pts
Underground volcanic activity is called Intrusive.
Correct!
True
False
Question 13
1 / 1 pts
During the 1980 volcanic eruption of Mt. St. Helens, the peak was lowered by 1350 feet.
Correct!
True
False
Question 14
1 / 1 pts
Which type of magma is the LEAST likely for form pyroclastics?
Felsic
Correct!
Mafic
Intermediate
Question 15
1 / 1 pts
Felsic magma is LESS viscous than mafic magma.
True
Correct!
False
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