Question 1

Which the following chemicals that volcanoes can emit during eruptions can be harmful to the earth's ozone layer?

Accepted Answer

A) carbon dioxide 
B) nitrogen 
C) water vapor 
D) chlorine 
A) carbon dioxide 
B) nitrogen 
C) water vapor 
D) chlorine

Question 2

Of the energy released from Earth's interior,roughly how much is consumed forming new lithosphere at the spreading centers?

Accepted Answer

A) none of it 
B) less than half 
C) approximately two-thirds 
D) all of it 
A) none of it 
B) less than half 
C) approximately two-thirds 
D) all of it

Question 3

Between 70 percent and 95 percent of volcanic gas consists of

Accepted Answer

A) carbon dioxide. 
B) nitrogen. 
C) sulfur dioxide. 
D) water vapor. 
A) carbon dioxide. 
B) nitrogen. 
C) sulfur dioxide. 
D) water vapor.

Question 4

Metal-rich minerals precipitate out of hydrothermal vents at mid-ocean ridge crests.These minerals form ores of all of the following metals,except

Accepted Answer

A) copper. 
B) gold. 
C) iron. 
D) zinc. 
A) copper. 
B) gold. 
C) iron. 
D) zinc.

Question 5

Which of the following rocks is formed when large fragments of pyroclastics are welded together?

Accepted Answer

A) aa 
B) volcanic breccia 
C) pahoehoe 
D) volcanic tuff 
A) aa 
B) volcanic breccia 
C) pahoehoe 
D) volcanic tuff

Question 6

A torrential mudflow of wet volcanic debris is called a(n)

Accepted Answer

A) ash flow tuff. 
B) landslide. 
C) lahar. 
D) eruption cloud. 
A) ash flow tuff. 
B) landslide. 
C) lahar. 
D) eruption cloud.

Question 7

What percentage of the energy flowing out of the earth goes into creating new lithosphere?

Accepted Answer

A) 10 percent 
B) 30 percent 
C) 50 percent 
D) 80 percent 
A) 10 percent 
B) 30 percent 
C) 50 percent 
D) 80 percent

Question 8

What types of lavas are erupted at convergent plate boundaries?

Accepted Answer

A) andesites 
B) basalts 
C) rhyolites 
D) all of the above 
A) andesites 
B) basalts 
C) rhyolites 
D) all of the above

Question 9

How hot are so-called "black smoker" hydrothermal vents present on the mid-ocean ridge crests?

Accepted Answer

A) 150°C 
B) 350°C 
C) 750°C 
D) 1500°C 
A) 150°C 
B) 350°C 
C) 750°C 
D) 1500°C

Question 10

The Cascade volcanoes are associated with a

Accepted Answer

A) convergent plate margin. 
B) transform plate margin. 
C) divergent plate margin. 
D) hot spot. 
A) convergent plate margin. 
B) transform plate margin. 
C) divergent plate margin. 
D) hot spot.

Question 11

Eruptions of rhyolite lava tend to be more explosive than basaltic and andesitic lavas because

Accepted Answer

A) rhyolite lavas are less viscous. 
B) rhyolite lavas form larger volcanoes. 
C) rhyolite lavas contain more gases. 
D) rhyolite lavas are more dense. 
A) rhyolite lavas are less viscous. 
B) rhyolite lavas form larger volcanoes. 
C) rhyolite lavas contain more gases. 
D) rhyolite lavas are more dense.

Question 12

Icelanders worry about the possible eruption of Katla volcano.Why is that?

Accepted Answer

A) Katla has not erupted for many years. 
B) Katla is a large volcano. 
C) Katla is covered by glacier. 
D) Katla typically erupts a few years after Eyjafjallajökull. 
A) Katla has not erupted for many years. 
B) Katla is a large volcano. 
C) Katla is covered by glacier. 
D) Katla typically erupts a few years after Eyjafjallajökull.

Question 13

What types of lavas are erupted at mid-ocean ridges?

Accepted Answer

A) andesites 
B) basalts 
C) rhyolites 
D) all of the above 
A) andesites 
B) basalts 
C) rhyolites 
D) all of the above

Question 14

Solidified fragments of volcanic material ejected into the air are called

Accepted Answer

A) phenocrysts. 
B) pillow basalts. 
C) pyroclasts. 
D) vesicles. 
A) phenocrysts. 
B) pillow basalts. 
C) pyroclasts. 
D) vesicles.

Question 15

An extremely vesicular volcanic rock of rhyolite composition is called

Accepted Answer

A) obsidian. 
B) pumice. 
C) tuff. 
D) phreatic. 
A) obsidian. 
B) pumice. 
C) tuff. 
D) phreatic.

Question 16

Volcanoes can provide __________,which can be used as a natural resource.

Accepted Answer

A) pumice 
B) geothermal energy 
C) ammonia 
D) pumice,geothermal energy,and ammonia 
A) pumice 
B) geothermal energy 
C) ammonia 
D) pumice,geothermal energy,and ammonia

Question 17

What type of volcano has the largest and most violent eruptions?

Accepted Answer

A) cinder cones 
B) resurgent calderas 
C) fissure eruptions 
D) shield volcanoes 
A) cinder cones 
B) resurgent calderas 
C) fissure eruptions 
D) shield volcanoes

Question 18

What determines the slope of a cinder cone?

Accepted Answer

A) the extent of regional faulting 
B) the maximum angle at which cinders remain stable 
C) the maximum slope of the underlying bedrock topography 
D) the viscosity of the lava 
A) the extent of regional faulting 
B) the maximum angle at which cinders remain stable 
C) the maximum slope of the underlying bedrock topography 
D) the viscosity of the lava

Question 19

Old Faithful in Yellowstone National Park is an example of a

Accepted Answer

A) geyser. 
B) central crater. 
C) fissure vent. 
D) fumarole. 
A) geyser. 
B) central crater. 
C) fissure vent. 
D) fumarole.

Question 20

What type of volcanic deposit may contain diamonds,such as the diamond mines of Kimberly,South Africa?

Accepted Answer

A) cinder cones 
B) diatremes 
C) pahoehoe flows 
D) pillow lavas 
A) cinder cones 
B) diatremes 
C) pahoehoe flows 
D) pillow lavas

Exam 12: Volcanoes

Which the following chemicals that volcanoes can emit during eruptions can be harmful to the earth's ozone layer?

Of the energy released from Earth's interior,roughly how much is consumed forming new lithosphere at the spreading centers?

Between 70 percent and 95 percent of volcanic gas consists of

Metal-rich minerals precipitate out of hydrothermal vents at mid-ocean ridge crests.These minerals form ores of all of the following metals,except

Which of the following rocks is formed when large fragments of pyroclastics are welded together?

A torrential mudflow of wet volcanic debris is called a(n)

What percentage of the energy flowing out of the earth goes into creating new lithosphere?

What types of lavas are erupted at convergent plate boundaries?

How hot are so-called "black smoker" hydrothermal vents present on the mid-ocean ridge crests?

The Cascade volcanoes are associated with a

Eruptions of rhyolite lava tend to be more explosive than basaltic and andesitic lavas because

Icelanders worry about the possible eruption of Katla volcano.Why is that?

What types of lavas are erupted at mid-ocean ridges?

Solidified fragments of volcanic material ejected into the air are called

An extremely vesicular volcanic rock of rhyolite composition is called

Volcanoes can provide __________,which can be used as a natural resource.

What type of volcano has the largest and most violent eruptions?

What determines the slope of a cinder cone?

Old Faithful in Yellowstone National Park is an example of a

What type of volcanic deposit may contain diamonds,such as the diamond mines of Kimberly,South Africa?

The Earth System

Plate Tectonics: The Unifying Theory

Earth Materials: Minerals and Rocks

Igneous Rocks: Solids From Melts

Sedimentation: Rocks Formed by Surface Processes

Metamorphism: Alteration of Rocks by Temperature and Pressure

Deformation: Modification of Rocks by Folding and Fracturing

Clocks in Rocks: Timing the Geologic Period

Early History of the Terrestrial Planets

History of the Continents

Geobiology: Life Interacts With Earth

Earthquakes

Exploring Earths Interior

The Climate System

Weathering,erosion,and Mass Wasting: Interactions Between the Climate and Plate Tectonic Systems

The Hydrologic Cycle and Groundwater

Stream Transport: From Mountains to Oceans

Winds and Deserts

Coastlines and Ocean Basins

Glaciers: the Work of Ice

Landscapes: Tectonic and Climate Interaction

The Human Impact of Earths Environment

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