Question 1

Which region has the greatest concentration of currently active volcanoes?

Accepted Answer

A)  Pacific "Ring of Fire" 
B)  Siberia 
C)  Red Sea area 
D)  coastal plain of west Africa 
A)  Pacific "Ring of Fire" 
B)  Siberia 
C)  Red Sea area 
D)  coastal plain of west Africa

Question 2

What is the largest immediate volcanic threat to human life and property?

Accepted Answer

A)  incandescent lava fountains and lava flows like at Kilauea since 1983 
B)  stratospheric ash clouds that pose a hazard to international airline travel 
C)  being encased in plaster like the former victims of Pompeii 
D)  proximity on the ground to explosive eruptions like Mount St. Helens, Pinatubo, and Nevado de Ruiz 
A)  incandescent lava fountains and lava flows like at Kilauea since 1983 
B)  stratospheric ash clouds that pose a hazard to international airline travel 
C)  being encased in plaster like the former victims of Pompeii 
D)  proximity on the ground to explosive eruptions like Mount St. Helens, Pinatubo, and Nevado de Ruiz

Question 3

Which kind of eruptive activity is most likely to be highly explosive?

Accepted Answer

A)  lava flows from a large cinder cone complex 
B)  eruptions of big, continental margin, composite cones 
C)  lava flows from a large shield volcano on an oceanic island 
D)  fissure eruptions feeding lava to flood basalt accumulations 
A)  lava flows from a large cinder cone complex 
B)  eruptions of big, continental margin, composite cones 
C)  lava flows from a large shield volcano on an oceanic island 
D)  fissure eruptions feeding lava to flood basalt accumulations

Question 4

What volcanic events formed Crater Lake, OR? When did they take place?

Accepted Answer

A)  The crater of a large, extinct cinder cone filled with water; 5 million years ago. 
B)  Caldera collapse followed major ash and pyrodastic- flow eruptions; 7700 years ago. 
C)  A powerful explosion blew away the top of a composite cone; 10 million years ago. 
D)  Landslides and volcanic mudflows dammed the Mazama River; 500 years ago. 
A)  The crater of a large, extinct cinder cone filled with water; 5 million years ago. 
B)  Caldera collapse followed major ash and pyrodastic- flow eruptions; 7700 years ago. 
C)  A powerful explosion blew away the top of a composite cone; 10 million years ago. 
D)  Landslides and volcanic mudflows dammed the Mazama River; 500 years ago.

Question 5

What are large, fairly steep- sided cones composed of lavas and pyroclastic layers?

Accepted Answer

A)  composite cones 
B)  cinder cones 
C)  shield 
D)  stratospheric 
A)  composite cones 
B)  cinder cones 
C)  shield 
D)  stratospheric

Question 6

Which best describes a caldera?

Accepted Answer

A)  a collapse pit less than 1 km2 on the summit of a volcano 
B)  a small, steep- sided, volcanic depression bored out by an eruptive plume 
C)  a large depression hundreds of km across full of volcanic deposits 
D)  a large circular volcanic depression caused by collapse after a large scale, explosive felsic eruption 
A)  a collapse pit less than 1 km2 on the summit of a volcano 
B)  a small, steep- sided, volcanic depression bored out by an eruptive plume 
C)  a large depression hundreds of km across full of volcanic deposits 
D)  a large circular volcanic depression caused by collapse after a large scale, explosive felsic eruption

Question 7

Which one of the following best describes volcanism in the Cascade Range of northern California through Washington and its northerly extension as the Garibaldi Belt in SW B.C.?

Accepted Answer

A)  related to plate subduction 
B)  related to a mid- ocean ridge system 
C)  related to deep, transform faults 
D)  related to a mantle plume 
A)  related to plate subduction 
B)  related to a mid- ocean ridge system 
C)  related to deep, transform faults 
D)  related to a mantle plume

Question 8

The recent (geologically) volcanic activity in Yellowstone National Park is ___________ .

Accepted Answer

A)  related to a divergent plate boundary 
B)  related to a transform plate boundary 
C)  related to intraplate, mantle plume volcanism 
D)  related to plate subduction 
A)  related to a divergent plate boundary 
B)  related to a transform plate boundary 
C)  related to intraplate, mantle plume volcanism 
D)  related to plate subduction

Question 9

Which one of the following is made of abundant pyroclastic materials?

Accepted Answer

A)  composite cone or stratovolcano 
B)  fissure- related flood basalts 
C)  basaltic shield volcano 
D)  rhyolite dome 
A)  composite cone or stratovolcano 
B)  fissure- related flood basalts 
C)  basaltic shield volcano 
D)  rhyolite dome

Question 10

What is the direct control on whether a volcano will erupt violently or quietly send out a few flows?

Accepted Answer

A)  the duration of the quiet interval since its last violent eruption 
B)  what the total volume of the volcano has at the time of eruption 
C)  the composition of the magma, its temperature, and dissolved gas content 
D)  the population density 
A)  the duration of the quiet interval since its last violent eruption 
B)  what the total volume of the volcano has at the time of eruption 
C)  the composition of the magma, its temperature, and dissolved gas content 
D)  the population density

Question 11

Which type of volcanoes are found along the Cascade and Andean Ranges?

Accepted Answer

The answer of Which type of volcanoes are found along...

Question 12

What are massive, gently sloping volcanoes built of successive, mafic lava flows?

Accepted Answer

A)  stratospheric 
B)  composite cones 
C)  shield 
D)  cinder cones 
A)  stratospheric 
B)  composite cones 
C)  shield 
D)  cinder cones

Question 13

Volcanic lapilli are particles_________ .

Accepted Answer

A)  of incandescent lava that attain aerodynamic shapes and weigh up to 200 tons 
B)  also called cinders, the size of small stones, 2 to 64 mm across 
C)  of fused flattened silica rich glass shards and stretched out gas bubbles 
D)  angular rock fragments larger than 64 mm 
A)  of incandescent lava that attain aerodynamic shapes and weigh up to 200 tons 
B)  also called cinders, the size of small stones, 2 to 64 mm across 
C)  of fused flattened silica rich glass shards and stretched out gas bubbles 
D)  angular rock fragments larger than 64 mm

Question 14

Volcanic bombs originate_________ .

Accepted Answer

A)  as blocks of volcanic rock ejected from an erupting volcanic crater 
B)  as erupted magma blobs that partly congeal before falling to the ground 
C)  as ash particles that join together in the eruptive plume and fall as cobble- sized objects 
D)  as laser- guided, granite blocks launched from a supersonic jet 
A)  as blocks of volcanic rock ejected from an erupting volcanic crater 
B)  as erupted magma blobs that partly congeal before falling to the ground 
C)  as ash particles that join together in the eruptive plume and fall as cobble- sized objects 
D)  as laser- guided, granite blocks launched from a supersonic jet

Question 15

Which magma association with the volcanic landform is false?

Accepted Answer

A)  glassy volcanic domes - felsic 
B)  composite cones - andesitic 
C)  cinder cones - mafic 
D)  volcanic plateaus and shields - felsic 
A)  glassy volcanic domes - felsic 
B)  composite cones - andesitic 
C)  cinder cones - mafic 
D)  volcanic plateaus and shields - felsic

Question 16

What is the most abundant type of magma erupted at oceanic spreading centres?

Accepted Answer

A)  mafic 
B)  andesitic 
C)  felsic 
D)  pyroclastic 
A)  mafic 
B)  andesitic 
C)  felsic 
D)  pyroclastic

Question 17

What was the approximate volume of rock and ash ejected by the last violent eruption of Mount St. Helens?

Accepted Answer

A)  18,000 km3 
B)  400 km3 
C)  400 m3 
D)  1 km3 
A)  18,000 km3 
B)  400 km3 
C)  400 m3 
D)  1 km3

Question 18

What type are the volcanoes of the Cascades and Alaska's Aleutian Islands?

Accepted Answer

A)  shield 
B)  cinder cones 
C)  composite cones 
D)  stratospheric 
A)  shield 
B)  cinder cones 
C)  composite cones 
D)  stratospheric

Question 19

_______is a major dissolved volatile constituent in both magmas and volcanic gases.

Accepted Answer

A)  Carbon monoxide 
B)  Hydrogen chloride 
C)  Methane 
D)  Water 
A)  Carbon monoxide 
B)  Hydrogen chloride 
C)  Methane 
D)  Water

Question 20

What is the largest, known volcano in the Solar System?

Accepted Answer

A)  Mauna Loa, Hawaii, Earth 
B)  Mauna Kea, southern hemisphere, Mars 
C)  Mount Olympus, Greece, Earth 
D)  Olympus Mons, Mars 
A)  Mauna Loa, Hawaii, Earth 
B)  Mauna Kea, southern hemisphere, Mars 
C)  Mount Olympus, Greece, Earth 
D)  Olympus Mons, Mars

Which region has the greatest concentration of currently active volcanoes?

What is the largest immediate volcanic threat to human life and property?

Which kind of eruptive activity is most likely to be highly explosive?

What volcanic events formed Crater Lake, OR? When did they take place?

What are large, fairly steep- sided cones composed of lavas and pyroclastic layers?

Which best describes a caldera?

Which one of the following best describes volcanism in the Cascade Range of northern California through Washington and its northerly extension as the Garibaldi Belt in SW B.C.?

The recent (geologically) volcanic activity in Yellowstone National Park is ___________ .

Which one of the following is made of abundant pyroclastic materials?

What is the direct control on whether a volcano will erupt violently or quietly send out a few flows?

Which type of volcanoes are found along the Cascade and Andean Ranges?

What are massive, gently sloping volcanoes built of successive, mafic lava flows?

Volcanic lapilli are particles_________ .

Volcanic bombs originate_________ .

Which magma association with the volcanic landform is false?

What is the most abundant type of magma erupted at oceanic spreading centres?

What was the approximate volume of rock and ash ejected by the last violent eruption of Mount St. Helens?

What type are the volcanoes of the Cascades and Alaska's Aleutian Islands?

_______is a major dissolved volatile constituent in both magmas and volcanic gases.

What is the largest, known volcano in the Solar System?

An Introduction to Geology and Plate Tectonics

Minerals: the Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earths Interior

The Ocean Floor

Plate Tectonics: the Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: the Work of Gravity

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters

Exam 15: Running Water

Which region has the greatest concentration of currently active volcanoes?

What is the largest immediate volcanic threat to human life and property?

Which kind of eruptive activity is most likely to be highly explosive?

What volcanic events formed Crater Lake, OR? When did they take place?

What are large, fairly steep- sided cones composed of lavas and pyroclastic layers?

Which best describes a caldera?

Which one of the following best describes volcanism in the Cascade Range of northern California through Washington and its northerly extension as the Garibaldi Belt in SW B.C.?

The recent (geologically) volcanic activity in Yellowstone National Park is ___________ .

Which one of the following is made of abundant pyroclastic materials?

What is the direct control on whether a volcano will erupt violently or quietly send out a few flows?

Which type of volcanoes are found along the Cascade and Andean Ranges?

What are massive, gently sloping volcanoes built of successive, mafic lava flows?

Volcanic lapilli are particles_________ .

Volcanic bombs originate_________ .

Which magma association with the volcanic landform is false?

What is the most abundant type of magma erupted at oceanic spreading centres?

What was the approximate volume of rock and ash ejected by the last violent eruption of Mount St. Helens?

What type are the volcanoes of the Cascades and Alaska's Aleutian Islands?

_______is a major dissolved volatile constituent in both magmas and volcanic gases.

What is the largest, known volcano in the Solar System?

An Introduction to Geology and Plate Tectonics

Minerals: the Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earths Interior

The Ocean Floor

Plate Tectonics: the Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: the Work of Gravity

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters