Question 1

A high-speed _______________ contains a high proportion of steam and advances in front of a pyroclastic flow.

Accepted Answer

The answer of A high-speed _______________ contains a high proportion...

Question 2

Ash eruptions form their own volcanic _______________ as rising ash plumes heat and lift surrounding air.

Accepted Answer

The answer of Ash eruptions form their own volcanic _______________...

Question 3

The danger of volcanic ash is increased when ____.

Accepted Answer

A) it is composed of hydrogen sulfide compounds 
B) the volcano creates rain, making building collapse more likely 
C) dry conditions allow it to collapse quickly to form tuff 
D) it contacts and melts snowbanks, resulting in flash floods 
E) the flammable ash comes into contact with fire or high heat 
A) it is composed of hydrogen sulfide compounds 
B) the volcano creates rain, making building collapse more likely 
C) dry conditions allow it to collapse quickly to form tuff 
D) it contacts and melts snowbanks, resulting in flash floods 
E) the flammable ash comes into contact with fire or high heat

Question 4

Which Italian city is dangerously located between two recently active volcanoes?

Accepted Answer

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

Question 5

Carbon dioxide ____.

Accepted Answer

A) is not dangerous due to its strong odor 
B) is a danger in a volcanic area even when no eruption is imminent 
C) tends to collect in the attic of houses when no eruption is imminent 
D) is only a danger during periods of volcanic activity 
E) is a particular danger to climbers and hikers since it is emitted at the summit of a volcano 
A) is not dangerous due to its strong odor 
B) is a danger in a volcanic area even when no eruption is imminent 
C) tends to collect in the attic of houses when no eruption is imminent 
D) is only a danger during periods of volcanic activity 
E) is a particular danger to climbers and hikers since it is emitted at the summit of a volcano

Question 6

Forecasts of the Mt. St. Helens eruption in 1980 were ____.

Accepted Answer

A) accurate about the force of the eruption, but not its timing 
B) mostly incorrect, leading to mistrust by local authorities and residents 
C) mostly correct, but were not acted on properly by authorities and residents 
D) not made, because the proper technology had not been developed 
E) correct, but did not reach local authorities in time to act on them 
A) accurate about the force of the eruption, but not its timing 
B) mostly incorrect, leading to mistrust by local authorities and residents 
C) mostly correct, but were not acted on properly by authorities and residents 
D) not made, because the proper technology had not been developed 
E) correct, but did not reach local authorities in time to act on them

Question 7

Volcanoes present a danger to aircraft ____.

Accepted Answer

A) that can be easily avoided since the danger builds slowly 
B) due to the effect on the humans aboard the aircraft 
C) due to the buildup of ash on propellers 
D) due to the effect of the ash on jet engines 
E) due to the corrosion of wing surfaces by volcanic gasses 
A) that can be easily avoided since the danger builds slowly 
B) due to the effect on the humans aboard the aircraft 
C) due to the buildup of ash on propellers 
D) due to the effect of the ash on jet engines 
E) due to the corrosion of wing surfaces by volcanic gasses

Question 8

Mudflows are a particular danger of ____.

Accepted Answer

A) cinder cone volcanoes 
B) resurgent calderas 
C) stratovolcanoes 
D) shield volcanoes 
E) lava domes 
A) cinder cone volcanoes 
B) resurgent calderas 
C) stratovolcanoes 
D) shield volcanoes 
E) lava domes

Question 9

The predominant weather in the Pacific Northwest ____.

Accepted Answer

A) makes mudflows the most serious concern in eruptions 
B) is likely to carry vog over major metropolitan areas 
C) is not expected to increase the danger of volcanic damage 
D) may interfere with evacuation and put more people at risk 
E) is likely to increase the chance of pyroclastic flows 
A) makes mudflows the most serious concern in eruptions 
B) is likely to carry vog over major metropolitan areas 
C) is not expected to increase the danger of volcanic damage 
D) may interfere with evacuation and put more people at risk 
E) is likely to increase the chance of pyroclastic flows

Question 10

Volcanic losses to life and property ____.

Accepted Answer

A) depend on the eruption products and the population density near the volcano 
B) have been decreased greatly by improvements in volcano prediction 
C) were greater in prehistoric times than modern times 
D) are greatest in developing countries and relatively minimal in developed countries 
E) are effectively mitigated by barriers and other constructions 
A) depend on the eruption products and the population density near the volcano 
B) have been decreased greatly by improvements in volcano prediction 
C) were greater in prehistoric times than modern times 
D) are greatest in developing countries and relatively minimal in developed countries 
E) are effectively mitigated by barriers and other constructions

Question 11

Mudflows move slowly enough that they present a danger to property but not to human life.

Accepted Answer

A) True 
 B)False

Question 12

The geological study of rocks around a previously active volcano ____.

Accepted Answer

A) is of scientific interest but does not aid eruption prediction 
B) is complicated by the effects of erosion 
C) concentrates on the study of tuff layers, with little other useful information 
D) can detect chemical changes in rocks caused by carbon dioxide emissions 
E) can only identify sites of lava flows 
A) is of scientific interest but does not aid eruption prediction 
B) is complicated by the effects of erosion 
C) concentrates on the study of tuff layers, with little other useful information 
D) can detect chemical changes in rocks caused by carbon dioxide emissions 
E) can only identify sites of lava flows

Question 13

Harmonic tremors are ____.

Accepted Answer

A) strong earthquakes generated by an eruption 
B) strong aftershocks generated after an eruption 
C) the effect of magma dome collapse 
D) weak earthquakes that precede an eruption 
E) the effect of large gas emissions 
A) strong earthquakes generated by an eruption 
B) strong aftershocks generated after an eruption 
C) the effect of magma dome collapse 
D) weak earthquakes that precede an eruption 
E) the effect of large gas emissions

Question 14

The hazard posed by a volcano depends on both the population nearby and the eruption product.

Accepted Answer

A) True 
 B)False

Question 15

The odorless, invisible gas that can be the most dangerous product of a volcano is ____.

Accepted Answer

A) hydrogen sulfide 
B) carbon dioxide 
C) carbon sulfide 
D) sulfur dioxide 
E) hydrogen dioxide 
A) hydrogen sulfide 
B) carbon dioxide 
C) carbon sulfide 
D) sulfur dioxide 
E) hydrogen dioxide

Question 16

Discuss the particular dangers posed by volcanic hazards due to the Campi Flegrei in Italy.

Accepted Answer

A successful answer should include at le

Question 17

A volcano that has not erupted for over 10,000 years is not considered to be an active threat.

Accepted Answer

A) True 
 B)False

Question 18

A friend of yours has built up a reputation in hospitality management and is an avid skier. Your friend is considering two equivalent job offers to manage services at ski resorts. One is in the town of Mt. Shasta, CA, 15 km SE of the peak of the mountain. The other is in Winter Park, CO, on the slope of the continental divide. Write a short email to your friend concerning factors from volcanic hazards only that may affect their decision.

Accepted Answer

Mt. Shasta is an active volcano, and eve

Question 19

Volcanic ash usually increases crop production after an eruption.

Accepted Answer

A) True 
 B)False

Question 20

Volcanic ash ____.

Accepted Answer

A) is so small that it does no damage if inhaled 
B) is carried so high into the atmosphere that it does not have much effect on the area near an eruption 
C) has a large effect near an eruption, but little effect further away 
D) is composed of aerosols formed from the reaction of gasses and water vapor 
E) is a major disruption to transportation and evacuation 
A) is so small that it does no damage if inhaled 
B) is carried so high into the atmosphere that it does not have much effect on the area near an eruption 
C) has a large effect near an eruption, but little effect further away 
D) is composed of aerosols formed from the reaction of gasses and water vapor 
E) is a major disruption to transportation and evacuation

A high-speed _______________ contains a high proportion of steam and advances in front of a pyroclastic flow.

Ash eruptions form their own volcanic _______________ as rising ash plumes heat and lift surrounding air.

The danger of volcanic ash is increased when ____.

Which Italian city is dangerously located between two recently active volcanoes?

Carbon dioxide ____.

Forecasts of the Mt. St. Helens eruption in 1980 were ____.

Volcanoes present a danger to aircraft ____.

Mudflows are a particular danger of ____.

The predominant weather in the Pacific Northwest ____.

Volcanic losses to life and property ____.

Mudflows move slowly enough that they present a danger to property but not to human life.

The geological study of rocks around a previously active volcano ____.

Harmonic tremors are ____.

The hazard posed by a volcano depends on both the population nearby and the eruption product.

The odorless, invisible gas that can be the most dangerous product of a volcano is ____.

Discuss the particular dangers posed by volcanic hazards due to the Campi Flegrei in Italy.

A volcano that has not erupted for over 10,000 years is not considered to be an active threat.

Volcanic ash usually increases crop production after an eruption.

Volcanic ash ____.

Natural Hazards and Disasters

Plate Tectonics and Physical Hazards

Earthquakes and Their Causes

Earthquake Predictions Forecasts and Mitigation

Tsunami

Volcanoes Tectonic Environments and Eruptions

Landslides and Other Downslope Movements

Sinkholes Land Subsidence and Swelling Soils

Weather Thunderstorms and Tornadoes

Climate Change Processes and History

Climate Change Impacts and Mitigation

Streams and Flood Processes

Floods and Human Interactions

Waves Beaches and Coastal Erosion

Hurricanes and nor Easters

Wildfires

Asteroid and Comet Impacts

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Exam 7: Volcanoes Hazards and Mitigation

A high-speed _______________ contains a high proportion of steam and advances in front of a pyroclastic flow.

Ash eruptions form their own volcanic _______________ as rising ash plumes heat and lift surrounding air.

The danger of volcanic ash is increased when ____.

Which Italian city is dangerously located between two recently active volcanoes?

Carbon dioxide ____.

Forecasts of the Mt. St. Helens eruption in 1980 were ____.

Volcanoes present a danger to aircraft ____.

Mudflows are a particular danger of ____.

The predominant weather in the Pacific Northwest ____.

Volcanic losses to life and property ____.

Mudflows move slowly enough that they present a danger to property but not to human life.

The geological study of rocks around a previously active volcano ____.

Harmonic tremors are ____.

The hazard posed by a volcano depends on both the population nearby and the eruption product.

The odorless, invisible gas that can be the most dangerous product of a volcano is ____.

Discuss the particular dangers posed by volcanic hazards due to the Campi Flegrei in Italy.

A volcano that has not erupted for over 10,000 years is not considered to be an active threat.

Volcanic ash usually increases crop production after an eruption.

Volcanic ash ____.

Natural Hazards and Disasters

Plate Tectonics and Physical Hazards

Earthquakes and Their Causes

Earthquake Predictions Forecasts and Mitigation

Tsunami

Volcanoes Tectonic Environments and Eruptions

Landslides and Other Downslope Movements

Sinkholes Land Subsidence and Swelling Soils

Weather Thunderstorms and Tornadoes

Climate Change Processes and History

Climate Change Impacts and Mitigation

Streams and Flood Processes

Floods and Human Interactions

Waves Beaches and Coastal Erosion

Hurricanes and nor Easters

Wildfires

Asteroid and Comet Impacts

Filters