Question 1

Volcanic soils are usually too hot and dry to be of use for agriculture.

Accepted Answer

A) True 
 B)False

Question 2

How can volcanoes contribute to climate change?

Accepted Answer

A)  Volcanoes release hot air into the atmosphere, contributing to global warming. 
B)  Erupted lava from volcanoes heats up the air in the atmosphere, contributing to global warming. 
C)  Lava flows cool into black rock that increase sunlight absorption by the Earth, contributing to global warming. 
D)  Volcanoes can send large amounts of fine-grained ash and sulfuric acid aerosols into the atmosphere, potentially causing global cooling. 
A)  Volcanoes release hot air into the atmosphere, contributing to global warming. 
B)  Erupted lava from volcanoes heats up the air in the atmosphere, contributing to global warming. 
C)  Lava flows cool into black rock that increase sunlight absorption by the Earth, contributing to global warming. 
D)  Volcanoes can send large amounts of fine-grained ash and sulfuric acid aerosols into the atmosphere, potentially causing global cooling.

Question 3

Where is the best place to be during a pyroclastic flow?

Accepted Answer

A)  In the water 
B)  In your house 
C)  On a hillside 
D)  In a valley 
E)  Nowhere is safe during a pyroclastic flow. 
A)  In the water 
B)  In your house 
C)  On a hillside 
D)  In a valley 
E)  Nowhere is safe during a pyroclastic flow.

Question 4

Why do cinder cone volcanoes have steep slopes?

Accepted Answer

A)  They are made from lava flows that pile up steeply. 
B)  They are found near other volcanoes which crowds their ability to spread out. 
C)  They are made mostly from water and ash that hardens into steep cones. 
D)  They are made from pyroclastic materials that pile up near where they were erupted. 
E)  They are made from very thick magma that doesn't flow outward very much. 
A)  They are made from lava flows that pile up steeply. 
B)  They are found near other volcanoes which crowds their ability to spread out. 
C)  They are made mostly from water and ash that hardens into steep cones. 
D)  They are made from pyroclastic materials that pile up near where they were erupted. 
E)  They are made from very thick magma that doesn't flow outward very much.

Question 5

At which plate boundary is more viscous lava found?

Accepted Answer

A)  Oceanic hotspots 
B)  Oceanic subduction zones 
C)  Oceanic divergent plate boundaries 
D)  Continental rift zones 
E)  Shield volcanoes on the ocean floor 
A)  Oceanic hotspots 
B)  Oceanic subduction zones 
C)  Oceanic divergent plate boundaries 
D)  Continental rift zones 
E)  Shield volcanoes on the ocean floor

Question 6

Which of the following is FALSE about magma?

Accepted Answer

A)  Most magmas come from melting of the asthenosphere. 
B)  Some magma comes from rocks melted through decompression. 
C)  Adding volatiles, such as water, to rock decreases its melting point and makes it easier to melt. 
D)  Some rocks are melted from magma that is rising from deep within the Earth. 
E)  Tectonic plates move around on an underground ocean of magma. 
A)  Most magmas come from melting of the asthenosphere. 
B)  Some magma comes from rocks melted through decompression. 
C)  Adding volatiles, such as water, to rock decreases its melting point and makes it easier to melt. 
D)  Some rocks are melted from magma that is rising from deep within the Earth. 
E)  Tectonic plates move around on an underground ocean of magma.

Question 7

Volcanic ash is very lightweight and therefore is not much of a threat to buildings.

Accepted Answer

A) True 
 B)False

Question 8

A very large volcano with gentle slopes is a ________ , which is comprised of ________.

Accepted Answer

A)  Shield volcano...lava flows 
B)  Shield volcano...pyroclastic debris 
C)  Stratovolcano...lava flows 
D)  Stratovolcano...lava flows and pyroclastic debris 
E)  Cinder cone volcano...pyroclastic debris 
A)  Shield volcano...lava flows 
B)  Shield volcano...pyroclastic debris 
C)  Stratovolcano...lava flows 
D)  Stratovolcano...lava flows and pyroclastic debris 
E)  Cinder cone volcano...pyroclastic debris

Question 9

Explain what viscosity is and how it affects the effects of a volcano. Give one example to illustrate your point.

Accepted Answer

Viscosity is the resistance to flow. Hig

Question 10

Do humans affect the frequency or size of volcanic eruptions?

Accepted Answer

A)  Yes. Global warming is a direct cause of many volcanic eruptions. 
B)  Yes. More people living on volcanoes causes volcanoes to erupt. 
C)  Yes. More people in the area of volcanoes means less groundwater in those areas and that causes volcanoes to erupt. 
D)  Yes. Mitigation measures by humans keep many volcanoes from erupting. 
E)  No. People do not increase or decrease the volcanic hazard. 
A)  Yes. Global warming is a direct cause of many volcanic eruptions. 
B)  Yes. More people living on volcanoes causes volcanoes to erupt. 
C)  Yes. More people in the area of volcanoes means less groundwater in those areas and that causes volcanoes to erupt. 
D)  Yes. Mitigation measures by humans keep many volcanoes from erupting. 
E)  No. People do not increase or decrease the volcanic hazard.

Question 11

Which type of magma typically results in the greatest explosive events?

Accepted Answer

A)  Basaltic 
B)  Andesitic 
C)  Rhyolitic 
D)  Pahoehoe 
E)  Aa 
A)  Basaltic 
B)  Andesitic 
C)  Rhyolitic 
D)  Pahoehoe 
E)  Aa

Question 12

Which of the following magma types will usually flow the fastest?

Accepted Answer

A)  Basaltic 
B)  Andesitic 
C)  Rhyolitic 
D)  All magma flows at similar speeds. 
A)  Basaltic 
B)  Andesitic 
C)  Rhyolitic 
D)  All magma flows at similar speeds.

Question 13

Because of the alert systems and people's willingness to heed warnings, no one was killed in the 1980 Mt. St. Helens eruption.

Accepted Answer

A) True 
 B)False

Question 14

Craters differ from calderas in that craters are created from an explosion and then collapse of the volcano top whereas calderas are simply the location where lava flows originate.

Accepted Answer

A) True 
 B)False

Question 15

The disaster at Lake Nyos in Cameroon (Africa) is thought to have been caused by a

Accepted Answer

A)  volcanic eruption that created a giant water wave, which flooded nearby areas. 
B)  volcanic eruption that created a landslide, which in turn created a giant water wave that flooded nearby areas. 
C)  volcanic eruption that destroyed a dam, which flooded nearby areas. 
D)  suffocating cloud of carbon dioxide gas. 
A)  volcanic eruption that created a giant water wave, which flooded nearby areas. 
B)  volcanic eruption that created a landslide, which in turn created a giant water wave that flooded nearby areas. 
C)  volcanic eruption that destroyed a dam, which flooded nearby areas. 
D)  suffocating cloud of carbon dioxide gas.

Question 16

Which of following effects might an area see even if a volcano does NOT actually erupt?

Accepted Answer

A)  Lahars and pyroclastic flows 
B)  Lahars and ash falls 
C)  Landslides and poisonous gases 
D)  Landslides and pyroclastic flows 
E)  Lava flows and poisonous gases 
A)  Lahars and pyroclastic flows 
B)  Lahars and ash falls 
C)  Landslides and poisonous gases 
D)  Landslides and pyroclastic flows 
E)  Lava flows and poisonous gases

Question 17

What type of volcano is found in Iceland?

Accepted Answer

A)  Shield 
B)  Stratovolcano 
C)  Cinder cone 
D)  Caldera 
E)  No volcanoes are found in Iceland. 
A)  Shield 
B)  Stratovolcano 
C)  Cinder cone 
D)  Caldera 
E)  No volcanoes are found in Iceland.

Question 18

Which of the following is NOT a reason why stratovolcanoes are dangerous?

Accepted Answer

A)  They are associated with higher viscosity magma. 
B)  They have dormant periods between eruptions, which can make people underestimate their hazard. 
C)  They erupt abundant pyroclastic debris. 
D)  They involve explosive eruptions. 
E)  They erupt fast-moving lava flows that kill many people. 
A)  They are associated with higher viscosity magma. 
B)  They have dormant periods between eruptions, which can make people underestimate their hazard. 
C)  They erupt abundant pyroclastic debris. 
D)  They involve explosive eruptions. 
E)  They erupt fast-moving lava flows that kill many people.

Volcanic soils are usually too hot and dry to be of use for agriculture.

How can volcanoes contribute to climate change?

Where is the best place to be during a pyroclastic flow?

Why do cinder cone volcanoes have steep slopes?

At which plate boundary is more viscous lava found?

Which of the following is FALSE about magma?

Volcanic ash is very lightweight and therefore is not much of a threat to buildings.

A very large volcano with gentle slopes is a , which is comprised of .

Explain what viscosity is and how it affects the effects of a volcano. Give one example to illustrate your point.

Do humans affect the frequency or size of volcanic eruptions?

Which type of magma typically results in the greatest explosive events?

Which of the following magma types will usually flow the fastest?

Because of the alert systems and people's willingness to heed warnings, no one was killed in the 1980 Mt. St. Helens eruption.

Craters differ from calderas in that craters are created from an explosion and then collapse of the volcano top whereas calderas are simply the location where lava flows originate.

The disaster at Lake Nyos in Cameroon (Africa) is thought to have been caused by a

Which of following effects might an area see even if a volcano does NOT actually erupt?

What type of volcano is found in Iceland?

Which of the following is NOT a reason why stratovolcanoes are dangerous?

Introduction to Natural Hazards

Internal Structure of the Earth and Plate Tectonics

Earthquakes

Tsunamis

Flooding

Mass Wasting

Subsidence and Soils

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Coastal Hazards

Climate and Climate Change

Wildfires

Impacts and Extinctions

Filters

Exam 5: Volcanoes

Volcanic soils are usually too hot and dry to be of use for agriculture.

How can volcanoes contribute to climate change?

Where is the best place to be during a pyroclastic flow?

Why do cinder cone volcanoes have steep slopes?

At which plate boundary is more viscous lava found?

Which of the following is FALSE about magma?

Volcanic ash is very lightweight and therefore is not much of a threat to buildings.

A very large volcano with gentle slopes is a ________ , which is comprised of ________.

Explain what viscosity is and how it affects the effects of a volcano. Give one example to illustrate your point.

Do humans affect the frequency or size of volcanic eruptions?

Which type of magma typically results in the greatest explosive events?

Which of the following magma types will usually flow the fastest?

Because of the alert systems and people's willingness to heed warnings, no one was killed in the 1980 Mt. St. Helens eruption.

Craters differ from calderas in that craters are created from an explosion and then collapse of the volcano top whereas calderas are simply the location where lava flows originate.

The disaster at Lake Nyos in Cameroon (Africa) is thought to have been caused by a

Which of following effects might an area see even if a volcano does NOT actually erupt?

What type of volcano is found in Iceland?

Which of the following is NOT a reason why stratovolcanoes are dangerous?

Introduction to Natural Hazards

Internal Structure of the Earth and Plate Tectonics

Earthquakes

Tsunamis

Flooding

Mass Wasting

Subsidence and Soils

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Coastal Hazards

Climate and Climate Change

Wildfires

Impacts and Extinctions

Filters

A very large volcano with gentle slopes is a , which is comprised of .