Question 1

If you were to find a caldera and crater of the same size and shape,how would you differentiate between them?

Accepted Answer

A)   Given time, the caldera will remain dormant, while the crater will not.
B)   No remnants of a volcanic shape will be present with the caldera, while they will be with the crater.
C)   Scoria will be found in the caldera but not in the crater.
D)   Ignimbrite will be found in the caldera but not in the crater.E) B) and C)
F) None of the above

Question 2

Of the three primary forms of subaerial volcanoes,____________ consist of alternating layers of tephra and solidified lava.

Accepted Answer

A)   stratovolcanoes
B)   cinder cones
C)   shield volcanoesD) All of the above
E) A) and C)

Question 3

Rhyolitic lavas ____________.

Accepted Answer

A)   do not flow as far from the vent as basaltic lavas do
B)   cool much more slowly than basaltic lavas do
C)   are associated with volcanoes that almost never emit pyroclastic debris
D)   All of the above are correct.E) C) and D)
F) All of the above

Question 4

Phreatomagmatic eruptions are ____________.

Accepted Answer

A)   explosive (pyroclastic) 
B)   effusive (dominated by lava flows) C) A) and B)
D) undefined

Question 5

Pillow lavas are associated with ____________.

Accepted Answer

A)   continental rhyolitic eruptions
B)   continental basaltic eruptions
C)   submarine rhyolitic eruptions
D)   submarine basaltic eruptionsE) A) and C)
F) All of the above

Question 6

The Hawaiian island chain is an example of a(n) ____________.

Accepted Answer

A)   island volcanic arc
B)   continental volcanic arc
C)   hot-spot island chain
D)   stratovolcanic assemblyE) B) and C)
F) A) and D)

Question 7

Volcanoes are entirely detrimental to the planet and human civilization,offering no benefits to humankind.

Accepted Answer

A) True 
 B)False

Question 8

The Columbia River Plateau is an example of a ____________.

Accepted Answer

A)   caldera
B)   fissure
C)   flood basalt province
D)   hot spotE) A) and D)
F) A) and C)

Question 9

Ash,cinders,and blocks are all types of ____________.

Accepted Answer

A)   volcaniclastic debris
B)   lava flows
C)   Pele's hair
D)   volcanoesE) B) and C)
F) None of the above

Question 10

Pele's hair ____________.

Accepted Answer

A)   consists of thin strands of basaltic volcanic glass
B)   acquires aerodynamic torpedo-like shapes during flight out of the volcanic vent
C)   forms only at the leading edge of basaltic lava flows
D)   was instrumental in scoring the winning goal to defeat Uruguay in the 1958 World Cup finalsE) All of the above
F) C) and D)

Question 11

The greatest hazard to human life associated with volcanoes is ____________.

Accepted Answer

A)   flowing lava
B)   volcanic gas
C)   falling ash
D)   pyroclastic flowsE) B) and C)
F) A) and B)

Question 12

The characteristic "rotten egg" smell of many active volcanoes is derived from ____________.

Accepted Answer

A)   iron and magnesium within lava
B)   carbon dioxide gas
C)   stale water within the magma chamber
D)   hydrogen sulfide gasE) A) and C)
F) C) and D)

Question 13

In 1902,a famous,deadly pyroclastic flow killed thousands of people on the Caribbean island of ____________.

Accepted Answer

A)   Puerto Rico
B)   Martinique
C)   Aruba
D)   JamaicaE) A) and B)
F) B) and C)

Question 14

What was unusual about the 1986 disaster around Lake Nyos in Cameroon?

Accepted Answer

A)   A volcanic eruption involved a lateral blast of volcaniclastic debris that no one anticipated.
B)   Pyroclastic flows buried surrounding villages, reminiscent of Pompeii 1,900 years earlier.
C)   Volcanically derived carbon dioxide gas bubbled from the lake and suffocated people and animals nearby.
D)   A slurry of lava and lake water flowed rapidly outward from the lake and buried surrounding villages.E) None of the above
F) B) and C)

Question 15

Pahoehoe ____________.

Accepted Answer

A)   forms when a basaltic lava flow ceases flowing and solidifies simultaneously
B)   has a smoother texture than a'a'
C)   is easier to walk on than a'a' is
D)   All of the above are correct.E) A) and D)
F) All of the above

Question 16

Which of the following is NOT an effect volcanic eruptions can have on climate?

Accepted Answer

A)   They can dim the stars.
B)   They can lower temperatures for at least a season.
C)   They can increase the growth rate of tree rings.
D)   They can cause more radiant sunsets.E) A) and D)
F) A) and C)

Question 17

Columnar jointing is a type of fracturing that occurs in rhyolitic lava flows.

Accepted Answer

A) True 
 B)False

Question 18

If you lived on the flanks of Mt.Saint Helens and it erupted,what would be the first of the hazards to reach your home?

Accepted Answer

A)   flowing lava
B)   volcanic gas
C)   falling ash
D)   pyroclastic flowsE) A) and B)
F) None of the above

Question 19

Of the three primary forms of subaerial volcanoes,____________ consist of a simple,conical pile of tephra.

Accepted Answer

A)   stratovolcanoes
B)   cinder cones
C)   shield volcanoesD) None of the above
E) A) and B)

Question 20

Nonviolent eruptions characterized by extensive flows of basaltic lava are termed ____________.

Accepted Answer

A)   pyroclastic
B)   effusive
C)   explosiveD) All of the above
E) B) and C)

Exam 5: The Wrath of Vulcan: Volcanic Eruptions

Rhyolitic lavas ____________.

Correct AnswerverifiedShow Answer

Pele's hair ____________.

Correct AnswerverifiedShow Answer

Phreatomagmatic eruptions are ____________.

Correct AnswerverifiedShow Answer

Of the three primary forms of subaerial volcanoes,____________ consist of alternating layers of tephra and solidified lava.

Correct AnswerverifiedShow Answer

The greatest hazard to human life associated with volcanoes is ____________.

Correct AnswerverifiedShow Answer

Pahoehoe ____________.

Correct AnswerverifiedShow Answer

The Columbia River Plateau is an example of a ____________.

Correct AnswerverifiedShow Answer

In 1902,a famous,deadly pyroclastic flow killed thousands of people on the Caribbean island of ____________.

Correct AnswerverifiedShow Answer

If you lived on the flanks of Mt.Saint Helens and it erupted,what would be the first of the hazards to reach your home?

Correct AnswerverifiedShow Answer

Volcanoes are entirely detrimental to the planet and human civilization,offering no benefits to humankind.

Correct AnswerverifiedShow Answer

Of the three primary forms of subaerial volcanoes,____________ consist of a simple,conical pile of tephra.

Correct AnswerverifiedShow Answer

Ash,cinders,and blocks are all types of ____________.

Correct AnswerverifiedShow Answer

What was unusual about the 1986 disaster around Lake Nyos in Cameroon?

Correct AnswerverifiedShow Answer

If you were to find a caldera and crater of the same size and shape,how would you differentiate between them?

Correct AnswerverifiedShow Answer

Nonviolent eruptions characterized by extensive flows of basaltic lava are termed ____________.

Correct AnswerverifiedShow Answer

The characteristic "rotten egg" smell of many active volcanoes is derived from ____________.

Correct AnswerverifiedShow Answer

Which of the following is NOT an effect volcanic eruptions can have on climate?

Correct AnswerverifiedShow Answer

Columnar jointing is a type of fracturing that occurs in rhyolitic lava flows.

Correct AnswerverifiedShow Answer

Pillow lavas are associated with ____________.

Correct AnswerverifiedShow Answer

The Hawaiian island chain is an example of a(n) ____________.

Correct AnswerverifiedShow Answer

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Columnar jointing is a type of fracturing that occurs in rhyolitic lava flows. $Columnar jointing is a type of fracturing that occurs in rhyolitic lava flows.$

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