Question 1

Mount Pelée on Martinique is an example of a ________.

Accepted Answer

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

Question 2

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?

Accepted Answer

A) amount of dissolved gas in the magma 
B) temperature of the magma 
C) composition of the magma 
D) all of these 
A) amount of dissolved gas in the magma 
B) temperature of the magma 
C) composition of the magma 
D) all of these

Question 3

Which of the following is not considered pyroclastic debris?

Accepted Answer

A) ash 
B) cinders 
C) bombs 
D) pahoehoe 
A) ash 
B) cinders 
C) bombs 
D) pahoehoe

Question 4

A ________ is the largest discordant body of intrusive,igneous rock.

Accepted Answer

A) lopolith 
B) laccolith 
C) pluton 
D) batholith 
A) lopolith 
B) laccolith 
C) pluton 
D) batholith

Question 5

Volcanic bombs originate ________.

Accepted Answer

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

Question 6

Match the letter on the figure with the term.  
-Bomb

Accepted Answer

The answer of Match the letter on the figure with...

Question 7

The average composition of rocks comprising a large composite cone or stratovolcano is similar to a(n)________ magma.

Accepted Answer

A) basaltic 
B) ultramafic 
C) andesitic 
D) rhyolitic 
A) basaltic 
B) ultramafic 
C) andesitic 
D) rhyolitic

Question 8

Match the letter on the figure with the term.  
-Pyroclastic material

Accepted Answer

The answer of Match the letter on the figure with...

Question 9

Which of the following is a tabular intrusive body with subparallel intrusive contacts?

Accepted Answer

A) dike 
B) laccolith 
C) stock 
D) columnar joints 
A) dike 
B) laccolith 
C) stock 
D) columnar joints

Question 10

Pyroclastic flows move ________.

Accepted Answer

A) very rapidly,too fast to outrun on foot 
B) as gravity flows similar to snow avalanches 
C) as a dense cloud that contains hot magma particles suspended in hot gases and moves rapidly downhill 
D) all of the above 
E) none of the above 
A) very rapidly,too fast to outrun on foot 
B) as gravity flows similar to snow avalanches 
C) as a dense cloud that contains hot magma particles suspended in hot gases and moves rapidly downhill 
D) all of the above 
E) none of the above

Question 11

Which of the following best describes melting of the mantle at subduction zones that leads to island arc volcanos?

Accepted Answer

A) Heat is carried downward with the subducting plate and melts the mantle above the downgoing plate. 
B) Water released from the subducting plate decreases the melting temperature in the mantle above the downgoing plate to generate magmas from the overlying mantle wedge. 
C) The subducting plate is heated as it is carried to depth and the subducted oceanic crust melts. 
D) The subducted plate subsides into the mantle and allows magma from the lower mantle magma ocean to rise toward the surface. 
A) Heat is carried downward with the subducting plate and melts the mantle above the downgoing plate. 
B) Water released from the subducting plate decreases the melting temperature in the mantle above the downgoing plate to generate magmas from the overlying mantle wedge. 
C) The subducting plate is heated as it is carried to depth and the subducted oceanic crust melts. 
D) The subducted plate subsides into the mantle and allows magma from the lower mantle magma ocean to rise toward the surface.

Question 12

Match the letter on the figure with the term.  
-Magma chamber

Accepted Answer

The answer of Match the letter on the figure with...

Question 13

Shield volcanos form from what type of magma?

Accepted Answer

A) high viscosity aa basalt magmas 
B) low viscosity rhyolite magmas 
C) low viscosity basalt magmas 
D) high viscosity rhyolite magmas 
A) high viscosity aa basalt magmas 
B) low viscosity rhyolite magmas 
C) low viscosity basalt magmas 
D) high viscosity rhyolite magmas

Question 14

Match the name of the tectonic feature with the Figure.  
-continental rift

Accepted Answer

The answer of Match the name of the tectonic feature...

Question 15

Ash and lapilli are different sized pyroclastic particles.

Accepted Answer

A) True 
 B)False

Question 16

The dominant rock type erupted by submarine volcanoes at spreading ridges is andesite.

Accepted Answer

A) True 
 B)False

Question 17

The greatest danger from pyroclastic flows is ________.

Accepted Answer

A) being incinerated by the hot gas and entrained magma. 
B) being smothered by hot gases and ash. 
C) being buried in ash. 
D) not significant because they move so slowly they can be avoided. 
A) being incinerated by the hot gas and entrained magma. 
B) being smothered by hot gases and ash. 
C) being buried in ash. 
D) not significant because they move so slowly they can be avoided.

Question 18

Cinder cones ________.

Accepted Answer

A) have very steep slopes 
B) are usually less than 300 meters (1000 feet)high 
C) consist largely of pyroclastics 
D) all of these 
A) have very steep slopes 
B) are usually less than 300 meters (1000 feet)high 
C) consist largely of pyroclastics 
D) all of these

Question 19

Which of the following is emplaced over millions of years to form a composite intrusive complex?

Accepted Answer

A) dike 
B) sill 
C) laccolith 
D) batholith 
A) dike 
B) sill 
C) laccolith 
D) batholith

Question 20

Most granitic batholiths are generated ________.

Accepted Answer

A) as intrusions beneath composite volcanos along convergent plate margins 
B) where spreading ridges occur beneath continents 
C) along transform faults,which accounts for their linear geographic distribution 
D) along hot spot chains beneath continents,like a welder cutting through the continent to make a linear belt of intrusive granites 
A) as intrusions beneath composite volcanos along convergent plate margins 
B) where spreading ridges occur beneath continents 
C) along transform faults,which accounts for their linear geographic distribution 
D) along hot spot chains beneath continents,like a welder cutting through the continent to make a linear belt of intrusive granites

Exam 9: Volcanoes and Other Igneous Activity

Mount Pelée on Martinique is an example of a ________.

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?

Which of the following is not considered pyroclastic debris?

A ________ is the largest discordant body of intrusive,igneous rock.

Volcanic bombs originate ________.

Match the letter on the figure with the term. -Bomb

The average composition of rocks comprising a large composite cone or stratovolcano is similar to a(n)________ magma.

Match the letter on the figure with the term. -Pyroclastic material

Which of the following is a tabular intrusive body with subparallel intrusive contacts?

Pyroclastic flows move ________.

Which of the following best describes melting of the mantle at subduction zones that leads to island arc volcanos?

Match the letter on the figure with the term. -Magma chamber

Shield volcanos form from what type of magma?

Match the name of the tectonic feature with the Figure. -continental rift

Ash and lapilli are different sized pyroclastic particles.

The dominant rock type erupted by submarine volcanoes at spreading ridges is andesite.

The greatest danger from pyroclastic flows is ________.

Cinder cones ________.

Which of the following is emplaced over millions of years to form a composite intrusive complex?

Most granitic batholiths are generated ________.

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Weathering, soil, and Mass Wasting

Running Water and Groundwater

Glaciers, deserts, and Wind

Plate Tectonics: a Scientific Revolution Unfolds

Earthquakes and Earths Interior

Crustal Deformation and Mountain Building

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 Weather

World Climates and Global Climate Change

Origin of Modern Astronomy

Touring Our Solar System

Light,astronomical Observations,and the Sun

Beyond Our Solar System

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