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EAPS 100 Homeworks 6-10 Questions with Detailed Verified
Answers (100% Correct Answers) /Already Graded A+
What event triggered the main eruption of Mount St. Helens in May 1980?
Ans: c. a landslide removed rocks and released pressure on the magma
When basaltic lava reach the ocean they
Ans: b. form pillow basalts
Which of the following is NOT a typical hazard posed to human-made
structures by lava flows?
Ans: b. high winds
A volcanic eruption occurring beneath an ice sheet is likely to cause
Ans: a. a hazardous flow
Shield volcanoes are composed primarily of
Ans: a. basalt lava flows
Composite volcanoes are so called because they
Ans: d. are composed of lava flows, pyroclastic material, and mudflows
The most dangerous type of volcano is a
Ans: d. composite volcano
Which of the following plate boundaries is least likely to produce composite
volcanoes?
Ans: c. continent-continent convergent boundary with a high mountain range
(Himalayas)
What are the rounded hills inside the Valles Caldera?
Approved By:
vPretest - Stuvia US
, 2
Ans: c. volcanic domes
Some scientists think that Yellowstone could cause a future disaster because
Ans: a. the area is part of a caldera
b. scientists think that magma is still present at depth
c. land near Yellowstone is uplifting in some places and subsiding in others
D. ALL OF THESE CHOICES ARE CORRECT
What tectonic setting is interpreted to be the cause of volcanism at
Yellowstone?
Ans: c. movement of North America over a mantle plume
Ash layers from the three most recent caldera-forming eruptions at
Yellowstone (2.1, 1.3, and 0.64 million years ago) stretch
Ans: d. from Canada to Mexico
Which of the following are characteristics of actively erupting volcanoes?
Ans: a. glowing orange lava flowing downhill
b. fragments of molten rock blasting into the air
c. billowing clouds of ash rising into the air
D. ALL OF THESE CHOICES ARE CORRECT
Which of these following materials is NOT produced by erupting volcanoes?
Ans: a. sandstone
Which of the following would be evidence that a volcano has NOT been active
for a long period of time?
Ans: c. well-developed soils on volcanic rocks
Which of the following are ways that viscosity affects gases in magma?
Ans: a. viscous magma prevents gas from escaping easily
Approved By:
vPretest - Stuvia US
EAPS 100 Homeworks 6-10 Questions with Detailed Verified
Answers (100% Correct Answers) /Already Graded A+
What event triggered the main eruption of Mount St. Helens in May 1980?
Ans: c. a landslide removed rocks and released pressure on the magma
When basaltic lava reach the ocean they
Ans: b. form pillow basalts
Which of the following is NOT a typical hazard posed to human-made
structures by lava flows?
Ans: b. high winds
A volcanic eruption occurring beneath an ice sheet is likely to cause
Ans: a. a hazardous flow
Shield volcanoes are composed primarily of
Ans: a. basalt lava flows
Composite volcanoes are so called because they
Ans: d. are composed of lava flows, pyroclastic material, and mudflows
The most dangerous type of volcano is a
Ans: d. composite volcano
Which of the following plate boundaries is least likely to produce composite
volcanoes?
Ans: c. continent-continent convergent boundary with a high mountain range
(Himalayas)
What are the rounded hills inside the Valles Caldera?
Approved By:
vPretest - Stuvia US
, 2
Ans: c. volcanic domes
Some scientists think that Yellowstone could cause a future disaster because
Ans: a. the area is part of a caldera
b. scientists think that magma is still present at depth
c. land near Yellowstone is uplifting in some places and subsiding in others
D. ALL OF THESE CHOICES ARE CORRECT
What tectonic setting is interpreted to be the cause of volcanism at
Yellowstone?
Ans: c. movement of North America over a mantle plume
Ash layers from the three most recent caldera-forming eruptions at
Yellowstone (2.1, 1.3, and 0.64 million years ago) stretch
Ans: d. from Canada to Mexico
Which of the following are characteristics of actively erupting volcanoes?
Ans: a. glowing orange lava flowing downhill
b. fragments of molten rock blasting into the air
c. billowing clouds of ash rising into the air
D. ALL OF THESE CHOICES ARE CORRECT
Which of these following materials is NOT produced by erupting volcanoes?
Ans: a. sandstone
Which of the following would be evidence that a volcano has NOT been active
for a long period of time?
Ans: c. well-developed soils on volcanic rocks
Which of the following are ways that viscosity affects gases in magma?
Ans: a. viscous magma prevents gas from escaping easily
Approved By:
vPretest - Stuvia US
