Question 1

Mount Vesuvius overlooks which modern Italian city?

Accepted Answer

A)  Rome 
B)  Milan 
C)  Venice 
D)  Naples 
E)  Turin 
A)  Rome 
B)  Milan 
C)  Venice 
D)  Naples 
E)  Turin

Question 2

The interaction between magma and groundwater produces steam that causes which kind of eruptions?

Accepted Answer

A)  Stratovolcanoes 
B)  Maars 
C)  Cinder cones 
D)  Volcanic domes 
E)  Shield volcanoes 
A)  Stratovolcanoes 
B)  Maars 
C)  Cinder cones 
D)  Volcanic domes 
E)  Shield volcanoes

Question 3

Basaltic lavas

Accepted Answer

A)  are very hot. 
B)  result from melting of the mantle. 
C)  are rich in iron and magnesium. 
D)  have low viscosity. 
E)  all of the above. 
A)  are very hot. 
B)  result from melting of the mantle. 
C)  are rich in iron and magnesium. 
D)  have low viscosity. 
E)  all of the above.

Question 4

Eruption under glacial ice produces outbursts of water from the glacier called

Accepted Answer

A)  jokulhlaups. 
B)  maars. 
C)  tuyas. 
D)  pillow basalts. 
E)  pyroclastic flows. 
A)  jokulhlaups. 
B)  maars. 
C)  tuyas. 
D)  pillow basalts. 
E)  pyroclastic flows.

Question 5

Both pahoehoe and aa are basaltic lava types.Which one is more viscous and moves more slowly?

Accepted Answer

The answer of Both pahoehoe and aa are basaltic lava...

Question 6

Eruptions at mid-ocean ridges are highly explosive.

Accepted Answer

A) True 
 B)False

Question 7

Describe the relationships among silica content,magma temperature,magma viscosity,and gas content.

Accepted Answer

Magmas with higher silica have

Question 8

The presence of water lowers the melting temperature of rocks.

Accepted Answer

A) True 
 B)False

Question 9

Magmas with low silica content tend to have higher viscosity.

Accepted Answer

A) True 
 B)False

Question 10

Weathering volcanic rocks produces fertile soils for agriculture.

Accepted Answer

A) True 
 B)False

Question 11

Maars are

Accepted Answer

A)  lava flows on Earth's Moon. 
B)  cinder cones on the flanks of larger volcanoes. 
C)  lava flows in Hawaii that flow all the way to the ocean and are quenched by seawater. 
D)  craters formed by the interaction of magma with groundwater. 
E)  basaltic lava flows with low explosivity. 
A)  lava flows on Earth's Moon. 
B)  cinder cones on the flanks of larger volcanoes. 
C)  lava flows in Hawaii that flow all the way to the ocean and are quenched by seawater. 
D)  craters formed by the interaction of magma with groundwater. 
E)  basaltic lava flows with low explosivity.

Question 12

Describe how a chain of volcanoes,like the Hawaiian Island Chain,can form far from any plate tectonic boundary.

Accepted Answer

If a relatively stationary source of hot

Question 13

How did the residents of Vestmannaeyjar,Iceland,save their harbor from a lava flow?

Accepted Answer

A)  They dug channels that diverted the lava flow away from the harbor. 
B)  They extracted more geothermal energy that was being produced by the volcano, decreasing the volume of lava erupted. 
C)  They constructed high cement walls around the harbor and the lava solidified against the walls. 
D)  As the lava cooled, they blasted the new rock away and dumped it offshore. 
E)  They chilled the lava flow with water, making the flow solidify before it blocked the harbor. 
A)  They dug channels that diverted the lava flow away from the harbor. 
B)  They extracted more geothermal energy that was being produced by the volcano, decreasing the volume of lava erupted. 
C)  They constructed high cement walls around the harbor and the lava solidified against the walls. 
D)  As the lava cooled, they blasted the new rock away and dumped it offshore. 
E)  They chilled the lava flow with water, making the flow solidify before it blocked the harbor.

Question 14

The eruption of Mount St.Helens was triggered by an earthquake and landslide.

Accepted Answer

A) True 
 B)False

Question 15

Which type of volcano has very gentle slopes?

Accepted Answer

A)  composite volcano 
B)  stratovolcano 
C)  volcanic dome 
D)  cinder cone 
E)  shield volcano 
A)  composite volcano 
B)  stratovolcano 
C)  volcanic dome 
D)  cinder cone 
E)  shield volcano

Question 16

Lava cooled rapidly by water or ice forms "pillows."

Accepted Answer

A) True 
 B)False

Question 17

Most active volcanoes are located near plate tectonic boundaries.

Accepted Answer

A) True 
 B)False

Question 18

How can studying the geologic history of a volcano help most in eruption forecasting?

Accepted Answer

A)  Most volcanoes erupt with a regular periodicity, so knowing the time period between eruptive cycles allows accurate predictions of when the next eruption will occur. 
B)  Information from geologic records allows scientists to pinpoint how big the next eruption will be from a certain volcano. 
C)  Mapping previous volcanic deposits from a volcano is helpful for developing hazard maps for use in land-use planning and disaster preparedness. 
D)  Mapping pyroclastic flows from previous eruptions will show exactly where the pyroclastic flows will go in the next eruption. 
E)  Mapping the extent of lahars from previous eruptions will show exactly where the lahars will go in the next eruption. 
A)  Most volcanoes erupt with a regular periodicity, so knowing the time period between eruptive cycles allows accurate predictions of when the next eruption will occur. 
B)  Information from geologic records allows scientists to pinpoint how big the next eruption will be from a certain volcano. 
C)  Mapping previous volcanic deposits from a volcano is helpful for developing hazard maps for use in land-use planning and disaster preparedness. 
D)  Mapping pyroclastic flows from previous eruptions will show exactly where the pyroclastic flows will go in the next eruption. 
E)  Mapping the extent of lahars from previous eruptions will show exactly where the lahars will go in the next eruption.

Question 19

Ash fall is a significant health hazard.

Accepted Answer

A) True 
 B)False

Question 20

Which volcano poses the greatest risk to southern British Columbia?

Accepted Answer

A)  Mt. Garibaldi 
B)  Mt. Meager 
C)  Mt. Cayley 
D)  Mt. Baker 
E)  Mt. Rainier 
A)  Mt. Garibaldi 
B)  Mt. Meager 
C)  Mt. Cayley 
D)  Mt. Baker 
E)  Mt. Rainier

Mount Vesuvius overlooks which modern Italian city?

The interaction between magma and groundwater produces steam that causes which kind of eruptions?

Basaltic lavas

Eruption under glacial ice produces outbursts of water from the glacier called

Both pahoehoe and aa are basaltic lava types.Which one is more viscous and moves more slowly?

Eruptions at mid-ocean ridges are highly explosive.

Describe the relationships among silica content,magma temperature,magma viscosity,and gas content.

The presence of water lowers the melting temperature of rocks.

Magmas with low silica content tend to have higher viscosity.

Weathering volcanic rocks produces fertile soils for agriculture.

Maars are

Describe how a chain of volcanoes,like the Hawaiian Island Chain,can form far from any plate tectonic boundary.

How did the residents of Vestmannaeyjar,Iceland,save their harbor from a lava flow?

The eruption of Mount St.Helens was triggered by an earthquake and landslide.

Which type of volcano has very gentle slopes?

Lava cooled rapidly by water or ice forms "pillows."

Most active volcanoes are located near plate tectonic boundaries.

How can studying the geologic history of a volcano help most in eruption forecasting?

Ash fall is a significant health hazard.

Which volcano poses the greatest risk to southern British Columbia?

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Landslides

Snow Avalanches

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters

Exam 5: Volcanoes and Volcanic Eruptions

Mount Vesuvius overlooks which modern Italian city?

The interaction between magma and groundwater produces steam that causes which kind of eruptions?

Basaltic lavas

Eruption under glacial ice produces outbursts of water from the glacier called

Both pahoehoe and aa are basaltic lava types.Which one is more viscous and moves more slowly?

Eruptions at mid-ocean ridges are highly explosive.

Describe the relationships among silica content,magma temperature,magma viscosity,and gas content.

The presence of water lowers the melting temperature of rocks.

Magmas with low silica content tend to have higher viscosity.

Weathering volcanic rocks produces fertile soils for agriculture.

Maars are

Describe how a chain of volcanoes,like the Hawaiian Island Chain,can form far from any plate tectonic boundary.

How did the residents of Vestmannaeyjar,Iceland,save their harbor from a lava flow?

The eruption of Mount St.Helens was triggered by an earthquake and landslide.

Which type of volcano has very gentle slopes?

Lava cooled rapidly by water or ice forms "pillows."

Most active volcanoes are located near plate tectonic boundaries.

How can studying the geologic history of a volcano help most in eruption forecasting?

Ash fall is a significant health hazard.

Which volcano poses the greatest risk to southern British Columbia?

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Landslides

Snow Avalanches

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters