Living with Earth 1st Edition

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Presentation transcript:

Living with Earth 1st Edition Classroom Response System Questions Chapter 6

What element has the most influence on the viscosity of magma? 06.01 What element has the most influence on the viscosity of magma? Temperature Composition Altitude Humidity Flow speed

What element has the most influence on the viscosity of magma? 06.01 What element has the most influence on the viscosity of magma? Temperature Composition Altitude Humidity Flow speed ANSWER: B, [p.155]

What makes an eruption from a stratovolcano particularly violent? 06.02 What makes an eruption from a stratovolcano particularly violent? Stratovolcanoes are commonly snow capped and the temperature difference between the erupting magma and the snow is extreme. Stratovolcanoes are so towering the debris builds up inertia as it falls. The erupting magma is gas-rich as well as viscous. Stratovolcano eruptions often result in a high death count because of the deadly gasses. The mafic magma emitted from a stratovolcano explosion flows quickly.

What makes an eruption from a stratovolcano particularly violent? 06.02 What makes an eruption from a stratovolcano particularly violent? Stratovolcanoes are commonly snow capped and the temperature difference between the erupting magma and the snow is extreme. Stratovolcanoes are so towering the debris builds up inertia as it falls. The erupting magma is gas-rich as well as viscous. Stratovolcano eruptions often result in a high death count because of the deadly gasses. The mafic magma emitted from a stratovolcano explosion flows quickly. ANSWER: B, [p. 159]

Which of the following statements about calderas is incorrect? 06.03 Which of the following statements about calderas is incorrect? Eruptions that form calderas often destroy the stratovolcano in the process. Lava Creek Tuff in Yellowstone National Park boasts the most recent caldera-forming eruption. Large caldera-forming eruptions are becoming more and more frequent. Calderas form when the volcanic mountain is shaken from the explosion and consequently crumbles into the newly formed magma chamber. The ash expelled during such an event covers an enormous area.

Which of the following statements about calderas is incorrect? 06.03 Which of the following statements about calderas is incorrect? Eruptions that form calderas often destroy the stratovolcano in the process. Lava Creek Tuff in Yellowstone National Park boasts the most recent caldera-forming eruption. Large caldera-forming eruptions are becoming more and more frequent. Calderas form when the volcanic mountain is shaken from the explosion and consequently crumbles into the newly formed magma chamber. The ash expelled during such an event covers an enormous area. ANSWER: C, [p. 161]

06.04 What type of volcano covers a widespread area and the lava is released through fractures. Shield Volcano Volcanic Dome Cinder Cone Stratovolcano Flood Basalt

06.04 What type of volcano covers a widespread area and the lava is released through fractures. Shield Volcano Volcanic Dome Cinder Cone Stratovolcano Flood Basalt ANSWER: E, [p. 163]

What are some hazards associated with volcanoes? 06.05 What are some hazards associated with volcanoes? The less viscous lava, such as mafic lava, can potentially flow faster than any human could run. Some volcanic gasses are dangerous if inhaled as they will damage lung tissue. When volcanic debris becomes unstable, lahars can occur; the force behind a lahar can bury an entire town. The SO2 emitted by volcanoes clings to moisture in the air and the result is acid rain; this can be deadly for crops. All of the above

What are some hazards associated with volcanoes? 06.05 What are some hazards associated with volcanoes? The less viscous lava, such as mafic lava, can potentially flow faster than any human could run. Some volcanic gasses are dangerous if inhaled as they will damage lung tissue. When volcanic debris becomes unstable, lahars can occur; the force behind a lahar can bury an entire town. The SO2 emitted by volcanoes clings to moisture in the air and the result is acid rain; this can be deadly for crops. All of the above ANSWER: E, [pp. 172-178]