Exam 6: Volcanic Eruptions: Plate Tectonics and Magmas

Highly fluid basaltic lava may cool with a smooth,ropy surface called pahoehoe,whereas lower temperature,slower flowing,more viscous basaltic lava commonly has a rough,blocky texture called a.

(True/False)

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Question 41

Water circulating at thousands of feet below the surface can be heated to temperatures far above 100^$\circ$C (212^$\circ$F)without boiling because the pressure of the overlying groundwater body is so great.

(True/False)

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Question 42

Some of Earth's most beautiful mountains are ________,including Mt.Kilimanjaro in Tanzania,Mt.Shasta in California,Mt.Rainier in Washington,and Mt.Fuji in Japan.

(Multiple Choice)

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Question 43

Antarctica does not lie above any hot spots,partly explaining its massive volumes of ice.

(True/False)

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Question 44

Magma compositions are independent of the amount of crustal rock melted and incorporated into the rising magma.

(True/False)

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Question 45

Oxygen and silicon are so abundant in the Earth's crust that their percentages dwarf those of all other elements.

(True/False)

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Question 46

Over 90 percent of volcanism is associated with the edges of tectonic plates,and most of the rest is caused by hot spots.

(True/False)

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Question 47

Over 80 percent of Earth's magma extruded through volcanism occurs at oceanic spreading centers.

(True/False)

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Question 48

The higher the viscosity of a magma,the more fluid is its behavior.

(True/False)

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Question 49

Although there are 92 naturally occurring elements,a mere eight make up more than 98 percent of the Earth's crust.

(True/False)

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Question 50

This volcano erupted in 1883 in the Sunda Strait between Sumatra and Java,exploding with a loudness heard 3000 miles away,then collapsing into its magma chamber,making a caldera and setting off tsunami that killed at least 36,000 people.

(Multiple Choice)

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Question 51

Transform faults have lots of associated volcanism because the strike slip motions keep a "lid" on the hot asthenosphere below,allowing it to melt.

(True/False)

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Question 52

While there are many hundreds of different minerals,the overwhelming majority of the Earth's crust is composed of just eight common rock-forming minerals.

(True/False)

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Question 53

Hawaiian volcanoes unlikely to erupt include _________________.

(Multiple Choice)

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Question 54

The typical trend in a rising plume of subduction-zone magma is to increase ____________.

(Multiple Choice)

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Question 55

Over _________ of volcanism is associated with the edges of tectonic plates.

(Multiple Choice)

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Question 56

The largest number of hot spots lie beneath the Juan de Fuca plate.

(True/False)

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Question 57

Most magma is generated by decreasing the pressure on hot rock.

(True/False)

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Question 58

The number of "hot spots" worldwide is ________________.

(Multiple Choice)

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Question 59

In the last 2 million years,three catastrophic eruptions have occurred at Yellowstone at about 2 million,1.3 million,and 600,000 years ago.

(True/False)

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(92)

Question 60

Showing 41 - 60 of 77

Highly fluid basaltic lava may cool with a smooth,ropy surface called pahoehoe,whereas lower temperature,slower flowing,more viscous basaltic lava commonly has a rough,blocky texture called a.

Water circulating at thousands of feet below the surface can be heated to temperatures far above 100^$\circ$C (212^$\circ$F)without boiling because the pressure of the overlying groundwater body is so great.

Some of Earth's most beautiful mountains are ________,including Mt.Kilimanjaro in Tanzania,Mt.Shasta in California,Mt.Rainier in Washington,and Mt.Fuji in Japan.

Antarctica does not lie above any hot spots,partly explaining its massive volumes of ice.

Magma compositions are independent of the amount of crustal rock melted and incorporated into the rising magma.

Oxygen and silicon are so abundant in the Earth's crust that their percentages dwarf those of all other elements.

Over 90 percent of volcanism is associated with the edges of tectonic plates,and most of the rest is caused by hot spots.

Over 80 percent of Earth's magma extruded through volcanism occurs at oceanic spreading centers.

The higher the viscosity of a magma,the more fluid is its behavior.

Although there are 92 naturally occurring elements,a mere eight make up more than 98 percent of the Earth's crust.

This volcano erupted in 1883 in the Sunda Strait between Sumatra and Java,exploding with a loudness heard 3000 miles away,then collapsing into its magma chamber,making a caldera and setting off tsunami that killed at least 36,000 people.

Transform faults have lots of associated volcanism because the strike slip motions keep a "lid" on the hot asthenosphere below,allowing it to melt.

While there are many hundreds of different minerals,the overwhelming majority of the Earth's crust is composed of just eight common rock-forming minerals.

Hawaiian volcanoes unlikely to erupt include _________________.

The typical trend in a rising plume of subduction-zone magma is to increase ____________.

Over _________ of volcanism is associated with the edges of tectonic plates.

The largest number of hot spots lie beneath the Juan de Fuca plate.

Most magma is generated by decreasing the pressure on hot rock.

The number of "hot spots" worldwide is ________________.

In the last 2 million years,three catastrophic eruptions have occurred at Yellowstone at about 2 million,1.3 million,and 600,000 years ago.

Natural Disasters and the Human Population

Internal Energy and Plate Tectonics

Earthquake Geology and Seismology

Plate Tectonics and Earthquakes

Earthquakes Throughout the United States and Canada

Volcano Processes and Deadly Events

Tsunami Versus Wind-Caused Waves

External Energy Fuels Weather and Climate

Tornadoes, Lightning, Heat, and Cold

Hurricanes

Climate Change

Floods

Fire

Mass Movements

Coastal Processes and Hazards

Impacts With Space Objects

Filters

Exam 6: Volcanic Eruptions: Plate Tectonics and Magmas

Highly fluid basaltic lava may cool with a smooth,ropy surface called pahoehoe,whereas lower temperature,slower flowing,more viscous basaltic lava commonly has a rough,blocky texture called a.

Water circulating at thousands of feet below the surface can be heated to temperatures far above 100 ∘\circ∘ C (212 ∘\circ∘ F)without boiling because the pressure of the overlying groundwater body is so great.

Some of Earth's most beautiful mountains are ________,including Mt.Kilimanjaro in Tanzania,Mt.Shasta in California,Mt.Rainier in Washington,and Mt.Fuji in Japan.

Antarctica does not lie above any hot spots,partly explaining its massive volumes of ice.

Magma compositions are independent of the amount of crustal rock melted and incorporated into the rising magma.

Oxygen and silicon are so abundant in the Earth's crust that their percentages dwarf those of all other elements.

Over 90 percent of volcanism is associated with the edges of tectonic plates,and most of the rest is caused by hot spots.

Over 80 percent of Earth's magma extruded through volcanism occurs at oceanic spreading centers.

The higher the viscosity of a magma,the more fluid is its behavior.

Although there are 92 naturally occurring elements,a mere eight make up more than 98 percent of the Earth's crust.

This volcano erupted in 1883 in the Sunda Strait between Sumatra and Java,exploding with a loudness heard 3000 miles away,then collapsing into its magma chamber,making a caldera and setting off tsunami that killed at least 36,000 people.

Transform faults have lots of associated volcanism because the strike slip motions keep a "lid" on the hot asthenosphere below,allowing it to melt.

While there are many hundreds of different minerals,the overwhelming majority of the Earth's crust is composed of just eight common rock-forming minerals.

Hawaiian volcanoes unlikely to erupt include _________________.

The typical trend in a rising plume of subduction-zone magma is to increase ____________.

Over _________ of volcanism is associated with the edges of tectonic plates.

The largest number of hot spots lie beneath the Juan de Fuca plate.

Most magma is generated by decreasing the pressure on hot rock.

The number of "hot spots" worldwide is ________________.

In the last 2 million years,three catastrophic eruptions have occurred at Yellowstone at about 2 million,1.3 million,and 600,000 years ago.

Natural Disasters and the Human Population

Internal Energy and Plate Tectonics

Earthquake Geology and Seismology

Plate Tectonics and Earthquakes

Earthquakes Throughout the United States and Canada

Volcano Processes and Deadly Events

Tsunami Versus Wind-Caused Waves

External Energy Fuels Weather and Climate

Tornadoes, Lightning, Heat, and Cold

Hurricanes

Climate Change

Floods

Fire

Mass Movements

Coastal Processes and Hazards

Impacts With Space Objects

Filters

Water circulating at thousands of feet below the surface can be heated to temperatures far above 100^$\circ$C (212^$\circ$F)without boiling because the pressure of the overlying groundwater body is so great.