Question 1

Pillow lavas are _______.

Accepted Answer

A)  ryholitic magmas that form at pyroclastic flows 
B)  rhyolitic magmas extruded as piles of bombs that accumulate in piles of rocks that look like a pile of pillows 
C)  basaltic magmas extruded as piles of bombs that accumulate in piles of rocks that look like a pile of pillows 
D)  basaltic magmas that form at pyroclastic flows 
A)  ryholitic magmas that form at pyroclastic flows 
B)  rhyolitic magmas extruded as piles of bombs that accumulate in piles of rocks that look like a pile of pillows 
C)  basaltic magmas extruded as piles of bombs that accumulate in piles of rocks that look like a pile of pillows 
D)  basaltic magmas that form at pyroclastic flows C

Question 2

A volcanic deposit comprised of red to black lapilli- sized pyroclastic material associated with pahoehoe lava flows was probably deposited on_______ .

Accepted Answer

A)  a large composite volcano 
B)  a satellite shield volcano on a rhyolitic caldera 
C)  a cinder cone 
D)  a shield volcano 
A)  a large composite volcano 
B)  a satellite shield volcano on a rhyolitic caldera 
C)  a cinder cone 
D)  a shield volcano C

Question 3

Pillow lavas are_______ .

Accepted Answer

A)  andesitic bombs erupted from a cinder cone that accumulate as pillow- like masses around the cone 
B)  basaltic lava tubes erupted on the seafloor in volcanic piles analogous to toothpaste extruded from a tube 
C)  rhyolite glasses that develop a banding that resembles a pillow case with internal snowflake obsidian that looks like feathers 
D)  basaltic magmas erupted on the seafloor as magma blobs from an explosive, submarine eruption 
A)  andesitic bombs erupted from a cinder cone that accumulate as pillow- like masses around the cone 
B)  basaltic lava tubes erupted on the seafloor in volcanic piles analogous to toothpaste extruded from a tube 
C)  rhyolite glasses that develop a banding that resembles a pillow case with internal snowflake obsidian that looks like feathers 
D)  basaltic magmas erupted on the seafloor as magma blobs from an explosive, submarine eruption B

Question 4

Compare and contrast the following: shield volcanoes, composite cones/stratovolcanoes, and cinder cones.

Accepted Answer

Students should note that while all of t

Question 5

Which type of plate margin is characterized by volcanoes that include basalt, andesite, dacite and rhyolite?

Accepted Answer

A)  transform faults 
B)  convergent plate margins 
C)  hot spots 
D)  spreading ridges 
A)  transform faults 
B)  convergent plate margins 
C)  hot spots 
D)  spreading ridges

Question 6

In the movie "Volcano" basaltic lava flows are shown running down flat streets at speeds faster than humans could run. From your knowledge of magma viscosity, is this realistic?

Accepted Answer

A)  Yes, the viscosity of basalt magma is similar to water so it would flow at comparable rates. 
B)  No, the viscosity of basaltic magma is much higher than water, and thus, would flow much faster than water. 
C)  No, the viscosity of basaltic magma is much higher than water, and thus would flow much slower than water. 
D)  There is no way of knowing because basaltic magmas can have viscosities similar to water or higher depending on temperature and fluids, and thus there isn't enough information. 
A)  Yes, the viscosity of basalt magma is similar to water so it would flow at comparable rates. 
B)  No, the viscosity of basaltic magma is much higher than water, and thus, would flow much faster than water. 
C)  No, the viscosity of basaltic magma is much higher than water, and thus would flow much slower than water. 
D)  There is no way of knowing because basaltic magmas can have viscosities similar to water or higher depending on temperature and fluids, and thus there isn't enough information.

Question 7

Volcano A erupts rocks with SiO2 content ranging from 49% to 52% whereas volcano B, 100km away, erupts materials with SiO2 content of 62- 68%. Which statement best characterizes these two volcanoes?

Accepted Answer

A)  Volcano A is likely to be a supervolcanoes with violent eruptions, whereas volcano B is probably a shield volcano with quiescent eruptions. 
B)  Both volcanoes are shield type volcanoes that are characterized by quiescent eruptions. 
C)  Both volcanoes are violent, explosive volcanoes that spread ash continent wide. 
D)  Volcano A is probably a shield volcano with typically quiescent eruptions, whereas Volcano B is likely a stratovolcano characterized by violent, explosive eruptions. 
A)  Volcano A is likely to be a supervolcanoes with violent eruptions, whereas volcano B is probably a shield volcano with quiescent eruptions. 
B)  Both volcanoes are shield type volcanoes that are characterized by quiescent eruptions. 
C)  Both volcanoes are violent, explosive volcanoes that spread ash continent wide. 
D)  Volcano A is probably a shield volcano with typically quiescent eruptions, whereas Volcano B is likely a stratovolcano characterized by violent, explosive eruptions.

Question 8

Which type of basaltic lava flow has its surface covered with sharp- edged, angular blocks and rubble?

Accepted Answer

A)  scoria 
B)  pillow lava 
C)  pahoehoe 
D)  aa 
A)  scoria 
B)  pillow lava 
C)  pahoehoe 
D)  aa

Question 9

The higher the viscosity of a magma, the _______the potential for explosive eruptions.

Accepted Answer

A)  higher 
B)  lower 
A)  higher 
B)  lower

Question 10

Kilauea is an example of a _______.

Accepted Answer

A)  volcanic neck 
B)  shield volcano 
C)  lava dome 
D)  cinder cone 
A)  volcanic neck 
B)  shield volcano 
C)  lava dome 
D)  cinder cone

Question 11

Match the letter on the figure with the term.
  
-Identify what letter E represents in the diagram.

Accepted Answer

A)  bomb 
B)  lava flow 
C)  magma chamber 
D)  vent 
E)  pyroclastic material 
A)  bomb 
B)  lava flow 
C)  magma chamber 
D)  vent 
E)  pyroclastic material

Question 12

Which one of the following statements concerning cinder cones is false?

Accepted Answer

A)  They are built mostly or entirely during one eruptive cycle. 
B)  The cinders most commonly are basaltic. 
C)  The cinders and other pyroclastic particles are normally consolidated into welded tuff. 
D)  They are small volcanoes with fairly steep sides. 
A)  They are built mostly or entirely during one eruptive cycle. 
B)  The cinders most commonly are basaltic. 
C)  The cinders and other pyroclastic particles are normally consolidated into welded tuff. 
D)  They are small volcanoes with fairly steep sides.

Question 13

Which of the following volcano types are short lived volcanoes that last a few days to months and then shut down?

Accepted Answer

A)  cinder cone 
B)  lava dome 
C)  shield volcano 
D)  composite volcano 
A)  cinder cone 
B)  lava dome 
C)  shield volcano 
D)  composite volcano

Question 14

Volcanic bombs originate_______ .

Accepted Answer

A)  as ash particles that join together in the eruptive plume and fall as cobble- sized objects 
B)  as blocks of volcanic rock ejected from an erupting volcanic crater 
C)  as enormous blocks launched in a solid form from a volcanic plug 
D)  as erupted magma blobs that partly congeal before falling to the ground 
A)  as ash particles that join together in the eruptive plume and fall as cobble- sized objects 
B)  as blocks of volcanic rock ejected from an erupting volcanic crater 
C)  as enormous blocks launched in a solid form from a volcanic plug 
D)  as erupted magma blobs that partly congeal before falling to the ground

Question 15

When Mt. St. Helens erupted in May of 1980, ash blew as far away as _______.

Accepted Answer

A)  Idaho 
B)  New Jersey 
C)  Italy 
D)  Oklahoma 
A)  Idaho 
B)  New Jersey 
C)  Italy 
D)  Oklahoma

Question 16

A _______ is a near surface, intrusive igneous rock body that results from local inflation of a horizontal sill.

Accepted Answer

A)  batholith 
B)  laccolith 
C)  dike 
D)  volcanic neck 
A)  batholith 
B)  laccolith 
C)  dike 
D)  volcanic neck

Question 17

The Columbia Plateau in the northwestern United States is an excellent example of_______ .

Accepted Answer

A)  flood basalts 
B)  pyroclastic flow deposits 
C)  an eroded shield volcano 
D)  silica- rich lava flows 
A)  flood basalts 
B)  pyroclastic flow deposits 
C)  an eroded shield volcano 
D)  silica- rich lava flows

Question 18

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Accepted Answer

A)  Mount Pelée 
B)  Mt. Vesuvius 
C)  Mt. Mazama 
D)  Kilauea 
A)  Mount Pelée 
B)  Mt. Vesuvius 
C)  Mt. Mazama 
D)  Kilauea

Question 19

Section 6.5 of the chapter notes that most shield volcanoes begin as seamounts and grow from there. What is the driving force behind this action?

Accepted Answer

A)  fracture zones 
B)  convergent boundaries 
C)  divergent boundaries 
D)  hot spot tectonics 
A)  fracture zones 
B)  convergent boundaries 
C)  divergent boundaries 
D)  hot spot tectonics

Question 20

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Accepted Answer

A)  volcanic bomb 
B)  pillow lava 
C)  pahoehoe 
D)  aa 
A)  volcanic bomb 
B)  pillow lava 
C)  pahoehoe 
D)  aa

Exam 6: Volcanoes and Other Igneous Activity

Pillow lavas are _______.

A volcanic deposit comprised of red to black lapilli- sized pyroclastic material associated with pahoehoe lava flows was probably deposited on_______ .

Pillow lavas are_______ .

Compare and contrast the following: shield volcanoes, composite cones/stratovolcanoes, and cinder cones.

Which type of plate margin is characterized by volcanoes that include basalt, andesite, dacite and rhyolite?

In the movie "Volcano" basaltic lava flows are shown running down flat streets at speeds faster than humans could run. From your knowledge of magma viscosity, is this realistic?

Volcano A erupts rocks with SiO2 content ranging from 49% to 52% whereas volcano B, 100km away, erupts materials with SiO2 content of 62- 68%. Which statement best characterizes these two volcanoes?

Which type of basaltic lava flow has its surface covered with sharp- edged, angular blocks and rubble?

The higher the viscosity of a magma, the _______the potential for explosive eruptions.

Kilauea is an example of a _______.

Match the letter on the figure with the term. -Identify what letter E represents in the diagram.

Which one of the following statements concerning cinder cones is false?

Which of the following volcano types are short lived volcanoes that last a few days to months and then shut down?

Volcanic bombs originate_______ .

When Mt. St. Helens erupted in May of 1980, ash blew as far away as _______.

A _______ is a near surface, intrusive igneous rock body that results from local inflation of a horizontal sill.

The Columbia Plateau in the northwestern United States is an excellent example of_______ .

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Section 6.5 of the chapter notes that most shield volcanoes begin as seamounts and grow from there. What is the driving force behind this action?

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Plate Tectonics: a Scientific Revolution Unfolds

Earthquakes and Earths Interior

Crustal Deformation and Mountain Building

Weathering, Soil, and Mass Movement

Running Water and Groundwater

Glaciers, Deserts, and Wind

Geologic Time

Earths Evolution Through Geologic Time

The Ocean Floor

Ocean Water and Ocean Life

The Dynamic Ocean

The Atmosphere: Composition, Structure, and Temperature

Moisture, Clouds, and Precipitation

Air Pressure and Wind

Weather Patterns and Severe Storms

World Climates and Global Climate Change

Origins of Modern Astronomy

Touring Our Solar System

Light, Telescopes, and the Sun

Beyond Our Solar System

Filters

Volcano A erupts rocks with SiO₂content ranging from 49% to 52% whereas volcano B, 100km away, erupts materials with SiO₂content of 62- 68%. Which statement best characterizes these two volcanoes?