Question 1

The dark igneous features shown in this photograph are:

Accepted Answer

A)  dikes 
B)  sills 
C)  volcanic necks 
D)  batholiths 
A)  dikes 
B)  sills 
C)  volcanic necks 
D)  batholiths

Question 2

Which of the following is likely to be true about the left volcanic feature compared to the right one in this figure?

Accepted Answer

A)  the magma has a higher viscosity 
B)  the magma has fewer silicate chains 
C)  the magma probably formed at a higher temperature 
D)  all of these 
A)  the magma has a higher viscosity 
B)  the magma has fewer silicate chains 
C)  the magma probably formed at a higher temperature 
D)  all of these

Question 3

Which numbered feature on this figure formed by an explosive pyroclastic eruption?

Accepted Answer

A)  Location 1, the Valles Caldera 
B)  Location 2, dark basalt flows along the Rio Grande 
C)  Location 3, the dark, basaltic volcanoes 
D)  Location 4, pegmatite in the northeastern part of the area 
A)  Location 1, the Valles Caldera 
B)  Location 2, dark basalt flows along the Rio Grande 
C)  Location 3, the dark, basaltic volcanoes 
D)  Location 4, pegmatite in the northeastern part of the area

Question 4

Continental rifts have a diverse suite of igneous rocks associated with them because melting occurs:

Accepted Answer

A)  in the mantle and in the crust 
B)  only in the crust 
C)  only in the mantle 
A)  in the mantle and in the crust 
B)  only in the crust 
C)  only in the mantle

Question 5

On this figure of Bowen's Reaction Series, which mineral would crystallize last from magma?

Accepted Answer

A)  1, olivine 
B)  2, calcium-rich plagioclase 
C)  3, sodium-rich plagioclase 
D)  4, K-feldspar 
A)  1, olivine 
B)  2, calcium-rich plagioclase 
C)  3, sodium-rich plagioclase 
D)  4, K-feldspar

Question 6

Most igneous rocks in the Sierra Nevada batholith formed from:

Accepted Answer

A)  a hot spot beneath continental crust 
B)  continental rifting 
C)  ocean-continent convergence 
D)  transform faulting 
A)  a hot spot beneath continental crust 
B)  continental rifting 
C)  ocean-continent convergence 
D)  transform faulting

Question 7

Which letter in this classification table indicates the position of basalt?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 8

As magma is generated along a subduction zone:

Accepted Answer

A)  the subducted plate melts in response to the increase in temperature 
B)  minerals in the subducted plate release water, which lowers the melting temperature of the mantle material above 
C)  friction from the act of subduction melts both the subducting and overlying plates 
A)  the subducted plate melts in response to the increase in temperature 
B)  minerals in the subducted plate release water, which lowers the melting temperature of the mantle material above 
C)  friction from the act of subduction melts both the subducting and overlying plates

Question 9

The igneous feature shown in this photograph is:

Accepted Answer

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

Question 10

An ophiolite is:

Accepted Answer

A)  a sliced-off piece of oceanic crust that has been thrust onto the edge of a continent or island 
B)  a mineral consisting of basalt and gabbro formed in the mantle 
C)  a mixture of mafic and felsic magma within pillow basalts 
A)  a sliced-off piece of oceanic crust that has been thrust onto the edge of a continent or island 
B)  a mineral consisting of basalt and gabbro formed in the mantle 
C)  a mixture of mafic and felsic magma within pillow basalts

Question 11

A mantle plume rises because:

Accepted Answer

A)  it is mostly molten 
B)  it is solid but less dense than material around it 
C)  it is molten and more dense than material around it 
D)  it is propelled upward by gas coming out of the magma 
A)  it is mostly molten 
B)  it is solid but less dense than material around it 
C)  it is molten and more dense than material around it 
D)  it is propelled upward by gas coming out of the magma

Question 12

Which number on this figure indicates transfer of thermal energy by a convection cell?

Accepted Answer

A)  1, direct contact between the burner and the pan 
B)  2, heating by thermal radiation through the air 
C)  3, heated water expands and rises to the top of the pan and then cools and flows back down 
D)  4, moving a pan of water away from the stove 
A)  1, direct contact between the burner and the pan 
B)  2, heating by thermal radiation through the air 
C)  3, heated water expands and rises to the top of the pan and then cools and flows back down 
D)  4, moving a pan of water away from the stove

Question 13

Which of the following causes magma to be less viscous?

Accepted Answer

A)  a lower temperature 
B)  fewer silicate chains in the magma 
C)  a more felsic composition 
D)  a higher percentage of crystals 
E)  none of these 
A)  a lower temperature 
B)  fewer silicate chains in the magma 
C)  a more felsic composition 
D)  a higher percentage of crystals 
E)  none of these

Question 14

An igneous rock that solidifies on Earth's surface is called an):

Accepted Answer

A)  intrusive rock 
B)  extrusive rock 
C)  magma rock 
D)  vesicular rock 
A)  intrusive rock 
B)  extrusive rock 
C)  magma rock 
D)  vesicular rock

Question 15

The main process that happens during the alpha type of radioactive decay is:

Accepted Answer

A)  an electron is given off 
B)  an electron is absorbed and turned into a neutron 
C)  an atom splits into two pieces 
D)  an alpha particle combines with a small atom to make a larger one 
A)  an electron is given off 
B)  an electron is absorbed and turned into a neutron 
C)  an atom splits into two pieces 
D)  an alpha particle combines with a small atom to make a larger one

Question 16

Which of the following statements correctly states how early crystallization affects the composition of a magma? Use the graph.

Accepted Answer

A)  Early crystallization causes the MgO mafic) content to decline in the magma. 
B)  Early crystallization causes the MgO content to increase in the magma. 
C)  Early crystallization causes the SiO content to decline in the magma. 
A)  Early crystallization causes the MgO mafic) content to decline in the magma. 
B)  Early crystallization causes the MgO content to increase in the magma. 
C)  Early crystallization causes the SiO content to decline in the magma.

Question 17

Which of the following choices is NOT true about magma chambers?

Accepted Answer

A)  Rock walls of magma chambers can withstand the intense heat and not melt. 
B)  Crystal setting occurs within magma chambers. 
C)  Different magmas can mix within a magma chamber depending on their densities. 
A)  Rock walls of magma chambers can withstand the intense heat and not melt. 
B)  Crystal setting occurs within magma chambers. 
C)  Different magmas can mix within a magma chamber depending on their densities.

Question 18

Hot spots in oceanic settings typically produce:

Accepted Answer

A)  flood basalts in the middle of a continent 
B)  huge caldera explosions 
C)  island arcs 
D)  lines or clusters of volcanic islands 
A)  flood basalts in the middle of a continent 
B)  huge caldera explosions 
C)  island arcs 
D)  lines or clusters of volcanic islands

Question 19

As depth increases into the Earth,:

Accepted Answer

A)  there is an increase in temperature and pressure 
B)  there is an increase in temperature only 
C)  there is an increase in pressure only 
D)  there is an increase in temperature and a decrease in pressure 
A)  there is an increase in temperature and pressure 
B)  there is an increase in temperature only 
C)  there is an increase in pressure only 
D)  there is an increase in temperature and a decrease in pressure

Question 20

The site on the accompanying figure that would most likely form a rock with large crystals is:

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

The dark igneous features shown in this photograph are:

Which of the following is likely to be true about the left volcanic feature compared to the right one in this figure?

Which numbered feature on this figure formed by an explosive pyroclastic eruption?

Continental rifts have a diverse suite of igneous rocks associated with them because melting occurs:

On this figure of Bowen's Reaction Series, which mineral would crystallize last from magma?

Most igneous rocks in the Sierra Nevada batholith formed from:

Which letter in this classification table indicates the position of basalt?

As magma is generated along a subduction zone:

The igneous feature shown in this photograph is:

An ophiolite is:

A mantle plume rises because:

Which number on this figure indicates transfer of thermal energy by a convection cell?

Which of the following causes magma to be less viscous?

An igneous rock that solidifies on Earth's surface is called an):

The main process that happens during the alpha type of radioactive decay is:

Which of the following statements correctly states how early crystallization affects the composition of a magma? Use the graph.

Which of the following choices is NOT true about magma chambers?

Hot spots in oceanic settings typically produce:

As depth increases into the Earth,:

The site on the accompanying figure that would most likely form a rock with large crystals is:

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Exam 5: Igneous Environments

The dark igneous features shown in this photograph are:

Which of the following is likely to be true about the left volcanic feature compared to the right one in this figure?

Which numbered feature on this figure formed by an explosive pyroclastic eruption?

Continental rifts have a diverse suite of igneous rocks associated with them because melting occurs:

On this figure of Bowen's Reaction Series, which mineral would crystallize last from magma?

Most igneous rocks in the Sierra Nevada batholith formed from:

Which letter in this classification table indicates the position of basalt?

As magma is generated along a subduction zone:

The igneous feature shown in this photograph is:

An ophiolite is:

A mantle plume rises because:

Which number on this figure indicates transfer of thermal energy by a convection cell?

Which of the following causes magma to be less viscous?

An igneous rock that solidifies on Earth's surface is called an):

The main process that happens during the alpha type of radioactive decay is:

Which of the following statements correctly states how early crystallization affects the composition of a magma? Use the graph.

Which of the following choices is NOT true about magma chambers?

Hot spots in oceanic settings typically produce:

As depth increases into the Earth,:

The site on the accompanying figure that would most likely form a rock with large crystals is:

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Volcanoes and Volcanic Hazards

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Seafloor and Continental Margins

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

Streams and Flooding

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters