Test Bank For Natural Disasters 10Th Edition Patrick Leon Abbott

Test Bank For Natural Disasters 10Th Edition Patrick Leon Abbott

Chapter 06 Test Bank: Volcanic Eruptions: Plate Tectonics and Magmas KEY

Multiple Choice Questions

1. The most famous of all volcanoes probably is Vesuvius, and the most famous of its eruptions are those of 79 ce, which buried the cities of ____________.

A. Pompeii and Herculaneum

B. Naples and Rome

C. Naples and Milano

D. Petra and Florence

E. Florence and Pisa

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

 Chapter: 06

Gradable: automatic

Section: Plate-Tectonic Setting of Volcanoes

Topic: Plate-Tectonic Setting of Volcanoes

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

A. 90%

B. 80%

C. 70%

D. 60%

E. 50%

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Plate-Tectonic Setting of Volcanoes

Topic: Plate-Tectonic Setting of Volcanoes

3. Over _________ of Earth’s magma extruded through volcanism takes place at the oceanic spreading centers.

A. 90%

B. 80%

C. 70%

D. 60%

E. 50%

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Plate-Tectonic Setting of Volcanoes

Topic: Plate-Tectonic Setting of Volcanoes

4. Spreading centers are an ideal location for volcanism because ______________.

A. they sit above the high-temperature asthenosphere

B. the asthenosphere rock has low percentages of SiO2

C. the oceanic plates pull apart causing hot asthenosphere rock to rise and undergo decompression melting to form magma that continues to rise

D. All of these choices are correct.

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Plate-Tectonic Setting of Volcanoes

Topic: Plate-Tectonic Setting of Volcanoes

5. Silicon and oxygen link up to form the silicon-oxygen ______________.

A. dihedron

B. trihedron

C. tetrahedron

D. hexahedron

E. dodecahedron

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Chemical Composition of Magmas

Topic: Chemical Composition of Magmas

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

A. percentage of SiO2

B. viscosity

C. explosive potential of the magma by holding in the gases more tightly

D. All of these choices are correct.

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Chemical Composition of Magmas

Topic: Chemical Composition of Magmas

7. The viscosity of magma is lowered by __________.

A. increasing temperature

B. decreasing crystal content

C. decreasing SiO2 content

D. All of these choices are correct.

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Viscosity, Temperature, and Water Content of Magmas

Topic: Viscosity, Temperature, and Water Content of Magmas

8. In magma, __________ is the most abundant dissolved gas.

A. water vapor (H2O)

B. carbon dioxide (CO2)

C. sulfur dioxide (SO2)

D. hydrogen sulfide (H2S)

E. carbon monoxide (CO)

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Viscosity, Temperature, and Water Content of Magmas

Topic: Viscosity, Temperature, and Water Content of Magmas

9. Rock may melt by _______________.

A. lowering the pressure on it

B. raising its temperature

C. increasing its water content

D. All of these choices are correct.

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: How a Volcano Erupts

Topic: How a Volcano Erupts

10. The presence of water ________ the melting point of rock.

A. raises

B. lowers

C. does not change

D. may raise or may lower

Accessibility: Keyboard Navigation

Bloom’s Level: 1. Remember

Chapter: 06

Gradable: automatic

Section: Plate-Tectonic Setting of Volcanoes

Topic: Plate-Tectonic Setting of Volcanoes