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Which of the following rock types is NOT characteristic of volcanic domes?


A) glassy volcanic rocks that are unstable over time
B) vesicular basalt with very large holes from dangerous gas
C) volcanic breccia formed by fracturing of the outer part of the dome
D) mixtures of pieces of the dome and ash from dome collapse

E) A) and B)
F) All of the above

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This volcano is broad and low,and is composed of basaltic lava flows.What kind of volcano is it? This volcano is broad and low,and is composed of basaltic lava flows.What kind of volcano is it? A) scoria cone B) shield volcano C) composite volcano D) volcanic dome E) caldera


A) scoria cone
B) shield volcano
C) composite volcano
D) volcanic dome
E) caldera

F) A) and B)
G) A) and C)

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Which of the following sites has volcanoes related to subduction? A is on an island arc,B is in the Andes,C is near Hawaii,D is along a mid-ocean ridge. Which of the following sites has volcanoes related to subduction? A is on an island arc,B is in the Andes,C is near Hawaii,D is along a mid-ocean ridge. A) A and B B) B and C C) C and D D) A and C E) B and D


A) A and B
B) B and C
C) C and D
D) A and C
E) B and D

F) A) and D)
G) D) and E)

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At what depth do gas bubbles have the most effect on magma?


A) when the magma first forms,before the bubbles can dissolve into the magma
B) at moderate depths,when the magma is moving rapidly through the conduit
C) at very shallow levels,such as within the volcano
D) none of these

E) A) and D)
F) B) and C)

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Which of the following is NOT a characteristic of a volcanic dome?


A) the outer part of the dome contains blocks and other rubble
B) some parts contain volcanic glass,such as obsidian
C) they are one of the largest types of volcanoes
D) many domes are associated with composite volcanoes and calderas

E) A) and B)
F) A) and C)

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What type of basaltic feature is shown in this photograph? What type of basaltic feature is shown in this photograph? A) vesicles B) volcanic bomb C) aa lava flow D) pahoehoe lava flow E) pyroclastic flow


A) vesicles
B) volcanic bomb
C) aa lava flow
D) pahoehoe lava flow
E) pyroclastic flow

F) A) and E)
G) C) and E)

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What is the main type of eruption that formed the volcano in this photograph? What is the main type of eruption that formed the volcano in this photograph? A) fluid lava flows B) eruption of viscous lava C) lava fountain D) eruption column E) pyroclastic flow


A) fluid lava flows
B) eruption of viscous lava
C) lava fountain
D) eruption column
E) pyroclastic flow

F) None of the above
G) C) and D)

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What type of volcanic eruption is probably shown in this photograph? What type of volcanic eruption is probably shown in this photograph? A) pyroclastic flow B) fire fountain C) basaltic lava flow D) felsic lava flow E) caldera eruption


A) pyroclastic flow
B) fire fountain
C) basaltic lava flow
D) felsic lava flow
E) caldera eruption

F) C) and D)
G) B) and E)

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What is the main volcanic hazard at site 1? What is the main volcanic hazard at site 1? A) lava flows B) small pyroclastic flow C) large,less frequent mudflows D) landslides from steep mountain fronts


A) lava flows
B) small pyroclastic flow
C) large,less frequent mudflows
D) landslides from steep mountain fronts

E) A) and B)
F) A) and C)

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What type of eruption formed this felsic volcanic breccia? What type of eruption formed this felsic volcanic breccia? A) a pahoehoe lava flow B) a pyroclastic column C) a pyroclastic flow D) a lava that broke apart while it flowed E) a lava fountain


A) a pahoehoe lava flow
B) a pyroclastic column
C) a pyroclastic flow
D) a lava that broke apart while it flowed
E) a lava fountain

F) B) and D)
G) B) and C)

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This relatively large,symmetrical volcano contains interlayered lava flow,pyroclastic deposits,and volcanic mudflows.What kind of volcano is it? This relatively large,symmetrical volcano contains interlayered lava flow,pyroclastic deposits,and volcanic mudflows.What kind of volcano is it? A) scoria cone B) shield volcano C) composite volcano D) volcanic dome E) fissure


A) scoria cone
B) shield volcano
C) composite volcano
D) volcanic dome
E) fissure

F) A) and D)
G) A) and B)

Correct Answer

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This volcano is relatively small and composed of volcanic cinders.What kind of volcano is it? This volcano is relatively small and composed of volcanic cinders.What kind of volcano is it? A) scoria cone B) shield volcano C) composite volcano D) volcanic dome E) caldera


A) scoria cone
B) shield volcano
C) composite volcano
D) volcanic dome
E) caldera

F) All of the above
G) A) and D)

Correct Answer

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The main cause of caldera collapse is:


A) a fissure eruption that allows the shield volcano to split into two or more parts
B) collapse of the north flank by landslides
C) removal of magmas that form pillow basalt
D) collapse of the roof of a magma chamber as magma erupts
E) all of these

F) B) and D)
G) B) and E)

Correct Answer

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This volcano is broad and low,and is composed of basaltic lava flows.What kind of volcano is it? This volcano is broad and low,and is composed of basaltic lava flows.What kind of volcano is it? A) scoria cone B) shield volcano C) composite volcano D) volcanic dome E) caldera


A) scoria cone
B) shield volcano
C) composite volcano
D) volcanic dome
E) caldera

F) A) and B)
G) A) and C)

Correct Answer

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Which of the following is a hazard but not a risk,according to the textbook?


A) the Kilauea volcano,which covers subdivisions with molten lava
B) a scoria cone that erupts hot molten fragments on an unpopulated Pacific island
C) a volcano in Iceland that threatens people with dangerous gases
D) a volcano in Iceland that caused catastrophic flooding that destroyed houses and roads
E) all of these are both a hazard and a risk

F) D) and E)
G) A) and B)

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