Question 1

What does the texture of this rock indicate about its cooling history? The magma cooled:

Accepted Answer

A)  entirely at the surface 
B)  for a while at some depth and then rose to the surface where it finished solidifying 
C)  slowly under relatively deep conditions 
D)  slowly and underwater 
A)  entirely at the surface 
B)  for a while at some depth and then rose to the surface where it finished solidifying 
C)  slowly under relatively deep conditions 
D)  slowly and underwater

Question 2

A coarse-grained intrusive igneous rock composed mostly of feldspar and quartz is called:

Accepted Answer

A)  Granite 
B)  Ryholite 
C)  Basalt 
D)  Gabbro 
E)  Andesite 
A)  Granite 
B)  Ryholite 
C)  Basalt 
D)  Gabbro 
E)  Andesite

Question 3

Which of the following can occur within a magma chamber?

Accepted Answer

A)  Sinking or floating crystals may change the composition of the remaining magma. 
B)  Wall rocks can melt and become incorporated into the magma. 
C)  If two magmas mix, the resulting magma would be between the compositions of the two magmas. 
D)  All of these. 
A)  Sinking or floating crystals may change the composition of the remaining magma. 
B)  Wall rocks can melt and become incorporated into the magma. 
C)  If two magmas mix, the resulting magma would be between the compositions of the two magmas. 
D)  All of these.

Question 4

Mt. Taylor in the diagram has a partial volcanic neck exposed. Which type of volcanic neck is being shown?

Accepted Answer

A)  beneath a volcano 
B)  above a volcano 
C)  with a volcano 
A)  beneath a volcano 
B)  above a volcano 
C)  with a volcano

Question 5

Which of the following is an example of heat transfer by convection?

Accepted Answer

A)  water within a pan is heated and flows in a circular path 
B)  seawater is drawn into a mid-ocean ridge, heated, and rises 
C)  the rise of material beneath mid-ocean ridges coupled with subduction 
D)  all of these 
A)  water within a pan is heated and flows in a circular path 
B)  seawater is drawn into a mid-ocean ridge, heated, and rises 
C)  the rise of material beneath mid-ocean ridges coupled with subduction 
D)  all of these

Question 6

A volcanic neck can form by:

Accepted Answer

A)  erosion of the volcano, leaving behind the solidified conduit inside the volcano 
B)  erosion of overlying rock layers exposing the conduit below the volcano 
C)  both of these 
A)  erosion of the volcano, leaving behind the solidified conduit inside the volcano 
B)  erosion of overlying rock layers exposing the conduit below the volcano 
C)  both of these

Question 7

Which of the letters shown on this figure would most likely be over magma related to decompression melting?

Accepted Answer

A)  A and B 
B)  A, B, and C 
C)  B, C, and D 
D)  C, D, and E 
E)  D and E 
A)  A and B 
B)  A, B, and C 
C)  B, C, and D 
D)  C, D, and E 
E)  D and E

Question 8

Which of the following igneous rocks is NOT characteristic of mid-ocean ridges?

Accepted Answer

A)  finely crystalline rocks that formed in dikes 
B)  gabbro that solidified in a magma chamber 
C)  pillow basalt 
D)  andesite and granodiorite 
A)  finely crystalline rocks that formed in dikes 
B)  gabbro that solidified in a magma chamber 
C)  pillow basalt 
D)  andesite and granodiorite

Question 9

Which of the sites shown in this figure have decompression melting in an oceanic setting?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  all of the locations shown 
E)  locations A and B only 
A)  A 
B)  B 
C)  C 
D)  all of the locations shown 
E)  locations A and B only

Question 10

Which of the following rock types does NOT involve dissolved gas in the magma?

Accepted Answer

A)  tuff 
B)  pumice 
C)  scoria 
D)  diorite 
E)  vesicular basalt 
A)  tuff 
B)  pumice 
C)  scoria 
D)  diorite 
E)  vesicular basalt

Question 11

Which of the following was NOT involved in forming magmas of the main batholith?

Accepted Answer

A)  subduction beneath western North America 
B)  water that caused partial melting of hot mantle 
C)  partial melting of continental crust 
D)  solidification of magma below the surface 
E)  recent normal faulting along the east side of the batholith 
A)  subduction beneath western North America 
B)  water that caused partial melting of hot mantle 
C)  partial melting of continental crust 
D)  solidification of magma below the surface 
E)  recent normal faulting along the east side of the batholith

Question 12

What does this texture indicate about the formation of this rock?

Accepted Answer

A)  It formed from an explosive pyroclastic eruption. 
B)  The rock solidified at great depth. 
C)  The magma formed some crystals before rising closer to the surface and solidifying. 
D)  The magma had abundant dissolved gas. 
A)  It formed from an explosive pyroclastic eruption. 
B)  The rock solidified at great depth. 
C)  The magma formed some crystals before rising closer to the surface and solidifying. 
D)  The magma had abundant dissolved gas.

Question 13

The place in the crust or mantle where igneous rocks begin to form is called the:

Accepted Answer

A)  source area 
B)  magma chamber 
C)  intrusive area 
D)  extrusive area 
A)  source area 
B)  magma chamber 
C)  intrusive area 
D)  extrusive area

Question 14

Which of the following are processes that can occur in large magma chambers?

Accepted Answer

A)  Crystals that form may sink or rise in the chamber. 
B)  A partially crystallized magma could be heated by a new, hotter magma entering the chamber. 
C)  Magma may partially melt the chamber's rock walls, forming a new magma composition. 
D)  All of these 
A)  Crystals that form may sink or rise in the chamber. 
B)  A partially crystallized magma could be heated by a new, hotter magma entering the chamber. 
C)  Magma may partially melt the chamber's rock walls, forming a new magma composition. 
D)  All of these

Question 15

Which of the following is NOT a way that magma can lose heat to begin solidifying?

Accepted Answer

A)  conduction to surrounding solid rocks 
B)  loss of thermal energy to the air and water 
C)  water that is heated and circulated near the magma 
D)  an increase in the rate of radioactive decay 
A)  conduction to surrounding solid rocks 
B)  loss of thermal energy to the air and water 
C)  water that is heated and circulated near the magma 
D)  an increase in the rate of radioactive decay

Question 16

Which of the following rock photographs depicts an igneous rock that trapped gas?

Accepted Answer

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

Question 17

Rocks of the continental crust contain different minerals and each mineral has its own melting point. If the minerals with the lowest melting temperatures are the only ones melted, this is referred to as:

Accepted Answer

A)  partial melting 
B)  complete melting 
C)  temporary melting 
D)  subductive melting 
A)  partial melting 
B)  complete melting 
C)  temporary melting 
D)  subductive melting

Question 18

Columnar joints, like the ones shown in the photograph, are formed:

Accepted Answer

A)  when hot but solid igneous rock contracts 
B)  when hot liquid igneous rock contracts 
C)  when hot but solid igneous rock expands 
D)  when hot liquid igneous rock expands 
A)  when hot but solid igneous rock contracts 
B)  when hot liquid igneous rock contracts 
C)  when hot but solid igneous rock expands 
D)  when hot liquid igneous rock expands

Question 19

Rock that has formed from cooling magma or lava is:

Accepted Answer

A)  Igneous rock 
B)  Metamorphic rock 
C)  Sedimentary rock 
A)  Igneous rock 
B)  Metamorphic rock 
C)  Sedimentary rock

Question 20

What texture is displayed by the igneous rock in this photograph?

Accepted Answer

A)  vesicles 
B)  breccia 
C)  porphyritic 
D)  glassy 
E)  none of these 
A)  vesicles 
B)  breccia 
C)  porphyritic 
D)  glassy 
E)  none of these

What does the texture of this rock indicate about its cooling history? The magma cooled:

A coarse-grained intrusive igneous rock composed mostly of feldspar and quartz is called:

Which of the following can occur within a magma chamber?

Mt. Taylor in the diagram has a partial volcanic neck exposed. Which type of volcanic neck is being shown?

Which of the following is an example of heat transfer by convection?

A volcanic neck can form by:

Which of the letters shown on this figure would most likely be over magma related to decompression melting?

Which of the following igneous rocks is NOT characteristic of mid-ocean ridges?

Which of the sites shown in this figure have decompression melting in an oceanic setting?

Which of the following rock types does NOT involve dissolved gas in the magma?

Which of the following was NOT involved in forming magmas of the main batholith?

What does this texture indicate about the formation of this rock?

The place in the crust or mantle where igneous rocks begin to form is called the:

Which of the following are processes that can occur in large magma chambers?

Which of the following is NOT a way that magma can lose heat to begin solidifying?

Which of the following rock photographs depicts an igneous rock that trapped gas?

Rocks of the continental crust contain different minerals and each mineral has its own melting point. If the minerals with the lowest melting temperatures are the only ones melted, this is referred to as:

Columnar joints, like the ones shown in the photograph, are formed:

Rock that has formed from cooling magma or lava is:

What texture is displayed by the igneous rock in this photograph?

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

Exam 5: Igneous Environments

What does the texture of this rock indicate about its cooling history? The magma cooled:

A coarse-grained intrusive igneous rock composed mostly of feldspar and quartz is called:

Which of the following can occur within a magma chamber?

Mt. Taylor in the diagram has a partial volcanic neck exposed. Which type of volcanic neck is being shown?

Which of the following is an example of heat transfer by convection?

A volcanic neck can form by:

Which of the letters shown on this figure would most likely be over magma related to decompression melting?

Which of the following igneous rocks is NOT characteristic of mid-ocean ridges?

Which of the sites shown in this figure have decompression melting in an oceanic setting?

Which of the following rock types does NOT involve dissolved gas in the magma?

Which of the following was NOT involved in forming magmas of the main batholith?

What does this texture indicate about the formation of this rock?

The place in the crust or mantle where igneous rocks begin to form is called the:

Which of the following are processes that can occur in large magma chambers?

Which of the following is NOT a way that magma can lose heat to begin solidifying?

Which of the following rock photographs depicts an igneous rock that trapped gas?

Rocks of the continental crust contain different minerals and each mineral has its own melting point. If the minerals with the lowest melting temperatures are the only ones melted, this is referred to as:

Columnar joints, like the ones shown in the photograph, are formed:

Rock that has formed from cooling magma or lava is:

What texture is displayed by the igneous rock in this photograph?

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