Question 1

Other than Earth, what planet is most likely to have active volcanoes?

Accepted Answer

A)  Mercury
B)  Venus
C)  Mars
D)  Saturn
E)  NeptuneF) B) and E)
G) B) and D)

Question 2

Mount ____________________ erupted in 79 A.D. and buried the Italian city of Pompeii.

Accepted Answer

The answer of Mount ____________________ erupted in 79 A.D. and...

Question 3

Although it is difficult to get a precise number of active volcanoes, a common estimate is about ____.

Accepted Answer

A)  100
B)  250
C)  550
D)  1100
E)  2000F) A) and C)
G) All of the above

Question 4

At convergent plate boundaries, more viscous magmas, usually of felsic composition, are emplaced as ____, thus accounting for the explosive eruptions that typically occur there.

Accepted Answer

A)  supervolcanoes
B)  plutons
C)  fissures
D)  lava domes
E)  cinder conesF) All of the above
G) A) and B)

Question 5

Briefly describe cinder cones.

Accepted Answer

Cinder cones are small, steep-sided volc...

Question 6

Would you rather be chased by a pahoehoe flow or an aa flow? Explain.

Accepted Answer

I would rather be chased by an aa flow. Pahoehoe flows are hotter and less viscous and can move rapidly. Aa flows are cooler, more viscous, and move much more slowly.

Question 7

Cinder cones ____.

Accepted Answer

A)  are large, gently sloped volcanoes
B)  often form on the flanks or within the calderas of larger volcanoes
C)  are often formed during the beginning stages of volcanic activity
D)  are also called stratovolcanoes
E)  result from the buildup of many layers of ancient lava flowsF) A) and E)
G) A) and C)

Question 8

Mafic magma is generated beneath spreading ridges, and intermediate or felsic magma forms where an oceanic plate is subducted beneath another plate. Therefore, we can conclude that most volcanism takes place at or near ____________________ and ____________________ plate boundaries.

Accepted Answer

divergent,...

Question 9

The particularly cold summer of 1816 was attributed to the huge eruption of Tambora in 1815 in Indonesia. In North America, 1816 was called ____________________.

Accepted Answer

"The Year Without a ...

Question 10

Volcanic eruptions destroy buildings and productive land, and cause injuries and fatalities to life. Why, then, is volcanism considered a constructive process?

Accepted Answer

Volcanic emissions played an important r...

Question 11

What are lava domes? Provide one example. Explain under what circumstances they form and what type of magma is usually involved? Are their eruptions gentle or violent?

Accepted Answer

Lava domes , also known as volcanic dome...

Question 12

Define volcanism.

Accepted Answer

Volcanism refers to all proces...

Question 13

Lava domes form from ____.

Accepted Answer

A)  mafic and intermediate magma
B)  intermediate magma
C)  viscous felsic and intermediate magma
D)  pyroclastic materials
E)  fissure eruptionsF) D) and E)
G) A) and B) C

Question 14

Geologists successfully gave timely warnings of impending eruptions of Mount St. Helens and Mount Pinatubo.

Accepted Answer

A) True 
 B)False

Question 15

Pyroclastic materials ____.

Accepted Answer

A)  have low viscosity and a ropy texture
B)  are rare to absent at great depths in the ocean
C)  do not vary in size
D)  are always ejected very quickly from volcanoes
E)  can only be found at locations where intraplate volcanism occursF) A) and B)
G) C) and E)

Question 16

What are the criteria used by geologists to give a semiquantitative measure of the size of an eruption?

Accepted Answer

A)  number of deaths caused by the eruption and the number of buildings destroyed
B)  volume of material erupted and height of the eruption plume
C)  size of the pre-erupted volcano and the type
D)  temperature and pressure during eruption
E)  sizes of pyroclastic materials ejected and the distances they travel from the volcanoF) All of the above
G) B) and C)

Question 17

The type of volcano with the gentlest slope is the ____________________ volcano.

Accepted Answer

The answer of The type of volcano with the gentlest...

Question 18

Basalt plateaus erupt from ____.

Accepted Answer

A)  supervolcanoes
B)  shield volcanoes
C)  fissures
D)  lava domes
E)  cinder conesF) A) and E)
G) B) and C)

Question 19

Compare and contrast fissure eruptions and pyroclastic sheet deposits.

Accepted Answer

During both fissure eruptions and pyroclastic sheet deposits, eruptions issue from long cracks or fissures, cover vast areas, and volcanoes fail to develop. During fissure eruptions, the lava is so fluid (has such low viscosity)that it spreads out and covers vast areas. In contrast, it seems that pyroclastic sheet deposits originated as pyroclastic flows-hence the name. The pyroclastic materials of many of these flows were so hot that they fused together to form welded tuff. Geologists now think that major pyroclastic flows issue from fissures formed during the origin of calderas.

Question 20

The three major types of volcanoes are ____.

Accepted Answer

A)  shield volcanoes, cinder cones, and lava domes
B)  shield volcanoes, cinder cones, and composite volcanoes
C)  cinder cones, composite volcanoes, and lava domes
D)  composite volcanoes, stratovolcanoes, and lava domes
E)  shield volcanoes, composite volcanoes, and stratovolcanoesF) A) and C)
G) B) and D)

Exam 5: Volcanoes and Volcanism

Other than Earth, what planet is most likely to have active volcanoes?

Correct Answer
verified

Mount ____________________ erupted in 79 A.D. and buried the Italian city of Pompeii.

Correct Answer
verified

Although it is difficult to get a precise number of active volcanoes, a common estimate is about ____.

Correct Answer
verified

At convergent plate boundaries, more viscous magmas, usually of felsic composition, are emplaced as ____, thus accounting for the explosive eruptions that typically occur there.

Correct Answer
verified

Briefly describe cinder cones.

Correct Answer
verified
Cinder cones are small, steep-sided volc...
View Answer

Would you rather be chased by a pahoehoe flow or an aa flow? Explain.

Correct Answer
verified
I would rather be chased by an aa flow. Pahoehoe flows are hotter and less viscous and can move rapidly. Aa flows are cooler, more viscous, and move much more slowly.

Cinder cones ____.

Correct Answer
verified

Mafic magma is generated beneath spreading ridges, and intermediate or felsic magma forms where an oceanic plate is subducted beneath another plate. Therefore, we can conclude that most volcanism takes place at or near and plate boundaries.

Correct Answer
verified
divergent,...
View Answer

The particularly cold summer of 1816 was attributed to the huge eruption of Tambora in 1815 in Indonesia. In North America, 1816 was called ____________________.

Correct Answer
verified
"The Year Without a ...
View Answer

Volcanic eruptions destroy buildings and productive land, and cause injuries and fatalities to life. Why, then, is volcanism considered a constructive process?

Correct Answer
verified
Volcanic emissions played an important r...
View Answer

What are lava domes? Provide one example. Explain under what circumstances they form and what type of magma is usually involved? Are their eruptions gentle or violent?

Correct Answer
verified
Lava domes , also known as volcanic dome...
View Answer

Define volcanism.

Correct Answer
verified
Volcanism refers to all proces...
View Answer

Lava domes form from ____.

Correct Answer
verified
C

Geologists successfully gave timely warnings of impending eruptions of Mount St. Helens and Mount Pinatubo.

Correct Answer
verified

Pyroclastic materials ____.

Correct Answer
verified

What are the criteria used by geologists to give a semiquantitative measure of the size of an eruption?

Correct Answer
verified

The type of volcano with the gentlest slope is the ____________________ volcano.

Correct Answer
verified

Basalt plateaus erupt from ____.

Correct Answer
verified

Compare and contrast fissure eruptions and pyroclastic sheet deposits.

The three major types of volcanoes are ____.

Correct Answer
verified

Exam 5: Volcanoes and Volcanism

Other than Earth, what planet is most likely to have active volcanoes?

Correct AnswerverifiedShow Answer

Mount ____________________ erupted in 79 A.D. and buried the Italian city of Pompeii.

Correct AnswerverifiedShow Answer

Although it is difficult to get a precise number of active volcanoes, a common estimate is about ____.

Correct AnswerverifiedShow Answer

At convergent plate boundaries, more viscous magmas, usually of felsic composition, are emplaced as ____, thus accounting for the explosive eruptions that typically occur there.

Correct AnswerverifiedShow Answer

Briefly describe cinder cones.

Correct AnswerverifiedCinder cones are small, steep-sided volc...View AnswerShow Answer

Would you rather be chased by a pahoehoe flow or an aa flow? Explain.

Correct AnswerverifiedI would rather be chased by an aa flow. Pahoehoe flows are hotter and less viscous and can move rapidly. Aa flows are cooler, more viscous, and move much more slowly.

Cinder cones ____.

Correct AnswerverifiedShow Answer

Mafic magma is generated beneath spreading ridges, and intermediate or felsic magma forms where an oceanic plate is subducted beneath another plate. Therefore, we can conclude that most volcanism takes place at or near ____________________ and ____________________ plate boundaries.

Correct Answerverifieddivergent,...View AnswerShow Answer

The particularly cold summer of 1816 was attributed to the huge eruption of Tambora in 1815 in Indonesia. In North America, 1816 was called ____________________.

Correct Answerverified"The Year Without a ...View AnswerShow Answer

Volcanic eruptions destroy buildings and productive land, and cause injuries and fatalities to life. Why, then, is volcanism considered a constructive process?

Correct AnswerverifiedVolcanic emissions played an important r...View AnswerShow Answer

What are lava domes? Provide one example. Explain under what circumstances they form and what type of magma is usually involved? Are their eruptions gentle or violent?

Correct AnswerverifiedLava domes , also known as volcanic dome...View AnswerShow Answer

Define volcanism.

Correct AnswerverifiedVolcanism refers to all proces...View AnswerShow Answer

Lava domes form from ____.

Correct AnswerverifiedC

Geologists successfully gave timely warnings of impending eruptions of Mount St. Helens and Mount Pinatubo.

Correct AnswerverifiedShow Answer

Pyroclastic materials ____.

Correct AnswerverifiedShow Answer

What are the criteria used by geologists to give a semiquantitative measure of the size of an eruption?

Correct AnswerverifiedShow Answer

The type of volcano with the gentlest slope is the ____________________ volcano.

Correct AnswerverifiedShow Answer

Basalt plateaus erupt from ____.

Correct AnswerverifiedShow Answer

Compare and contrast fissure eruptions and pyroclastic sheet deposits.

The three major types of volcanoes are ____.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Cinder cones are small, steep-sided volc...
View Answer

Correct Answer
verified
I would rather be chased by an aa flow. Pahoehoe flows are hotter and less viscous and can move rapidly. Aa flows are cooler, more viscous, and move much more slowly.

Correct Answer
verified

Mafic magma is generated beneath spreading ridges, and intermediate or felsic magma forms where an oceanic plate is subducted beneath another plate. Therefore, we can conclude that most volcanism takes place at or near and plate boundaries.

Correct Answer
verified
divergent,...
View Answer

Correct Answer
verified
"The Year Without a ...
View Answer

Correct Answer
verified
Volcanic emissions played an important r...
View Answer

Correct Answer
verified
Lava domes , also known as volcanic dome...
View Answer

Correct Answer
verified
Volcanism refers to all proces...
View Answer

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified