Question 1

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

Accepted Answer

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

Question 2

Which of the magma systems shown is likely to contain mostly basalt?

Accepted Answer

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

Question 3

A finely crystalline or glassy igneous texture indicates that:

Accepted Answer

A) there was a lot of gas in the magma 
B) the rock cooled quickly 
C) the rock broke apart as it flowed 
D) the rock cooled slowly 
E) the ash and pumice were hot and became compacted 
A) there was a lot of gas in the magma 
B) the rock cooled quickly 
C) the rock broke apart as it flowed 
D) the rock cooled slowly 
E) the ash and pumice were hot and became compacted

Question 4

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 5

Coarsely crystalline igneous textures indicate that:

Accepted Answer

A) there was a lot of gas in the magma 
B) the rock cooled quickly 
C) the rock broke apart as it flowed 
D) the rock cooled slowly 
E) the ash and pumice were hot and became compacted 
A) there was a lot of gas in the magma 
B) the rock cooled quickly 
C) the rock broke apart as it flowed 
D) the rock cooled slowly 
E) the ash and pumice were hot and became compacted

Question 6

Which of the following is likely to be true about the magma that formed 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 a higher silicate content 
C) the magma is probably more felsic 
D) all of these 
A) the magma has a higher viscosity 
B) the magma has a higher silicate content 
C) the magma is probably more felsic 
D) all of these

Question 7

How could a rock at point C be melted?

Accepted Answer

A) increase in temperature 
B) decrease in pressure 
C) increase in temperature accompanied by a decrease in pressure 
D) all of these 
A) increase in temperature 
B) decrease in pressure 
C) increase in temperature accompanied by a decrease in pressure 
D) all of these

Question 8

Which of the following changes in conditions represents the main cause of melting beneath mid-ocean ridges?

Accepted Answer

A) from A to B 
B) from A to C 
C) from A to D 
D) from C to B 
E) from D to B 
A) from A to B 
B) from A to C 
C) from A to D 
D) from C to B 
E) from D to B

Question 9

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

Accepted Answer

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

Question 10

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 11

What is typically occurring when magmatism occurs far away from plate boundaries?

Accepted Answer

A) new oceanic crust is created at mid-ocean ridges 
B) large volcanoes are built above subduction zones 
C) some type of thermal disturbance is occurring in the mantle 
D) all of these 
A) new oceanic crust is created at mid-ocean ridges 
B) large volcanoes are built above subduction zones 
C) some type of thermal disturbance is occurring in the mantle 
D) all of these

Question 12

Which of the following changes in conditions would cause melting of a solid rock?

Accepted Answer

A) from A to B 
B) from B to C 
C) from C to D 
D) from A to D 
E) from A to C 
A) from A to B 
B) from B to C 
C) from C to D 
D) from A to D 
E) from A to C

Question 13

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 in the presence of water 
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 in the presence of water

Question 14

How does the addition of water cause melting?

Accepted Answer

A) it heats the rocks 
B) it decreases the pressure on the rocks 
C) it increases the temperature while decreasing the pressure 
D) it changes the location of the liquid-solid boundary 
A) it heats the rocks 
B) it decreases the pressure on the rocks 
C) it increases the temperature while decreasing the pressure 
D) it changes the location of the liquid-solid boundary

Question 15

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

Accepted Answer

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

Question 16

At which of the sites shown in this figure would melting probably be caused by introduction of water into hot rocks?

Accepted Answer

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

Question 17

Which of the following changes in conditions would represent heating during burial?

Accepted Answer

A) from A to B 
B) from B to C 
C) from C to D 
D) from D to A 
E) from A to C 
A) from A to B 
B) from B to C 
C) from C to D 
D) from D to A 
E) from A to C

Question 18

Which of the following processes could result in a felsic magma?

Accepted Answer

A) partial melting of an intermediate-composition source 
B) partial melting of continental crust 
C) formation and settling of mafic crystals in an intermediate magma 
D) all of these 
A) partial melting of an intermediate-composition source 
B) partial melting of continental crust 
C) formation and settling of mafic crystals in an intermediate magma 
D) all of these

Question 19

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 20

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

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

Which of the magma systems shown is likely to contain mostly basalt?

A finely crystalline or glassy igneous texture indicates that:

A mantle plume rises because:

Coarsely crystalline igneous textures indicate that:

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

How could a rock at point C be melted?

Which of the following changes in conditions represents the main cause of melting beneath mid-ocean ridges?

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

Hot spots in oceanic settings typically produce:

What is typically occurring when magmatism occurs far away from plate boundaries?

Which of the following changes in conditions would cause melting of a solid rock?

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

How does the addition of water cause melting?

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

At which of the sites shown in this figure would melting probably be caused by introduction of water into hot rocks?

Which of the following changes in conditions would represent heating during burial?

Which of the following processes could result in a felsic magma?

The igneous feature shown in this photograph is:

A volcanic neck can form by:

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Volcanoes and Volcanic Hazards

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

The Seafloor and Continental Margins

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

Glaciers, shorelines, and Changing Sea Levels

Weathering, soil, and Unstable Slopes

Streams and Flooding

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Exam 5: Igneous Environments

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

Which of the magma systems shown is likely to contain mostly basalt?

A finely crystalline or glassy igneous texture indicates that:

A mantle plume rises because:

Coarsely crystalline igneous textures indicate that:

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

How could a rock at point C be melted?

Which of the following changes in conditions represents the main cause of melting beneath mid-ocean ridges?

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

Hot spots in oceanic settings typically produce:

What is typically occurring when magmatism occurs far away from plate boundaries?

Which of the following changes in conditions would cause melting of a solid rock?

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

How does the addition of water cause melting?

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

At which of the sites shown in this figure would melting probably be caused by introduction of water into hot rocks?

Which of the following changes in conditions would represent heating during burial?

Which of the following processes could result in a felsic magma?

The igneous feature shown in this photograph is:

A volcanic neck can form by:

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Volcanoes and Volcanic Hazards

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

The Seafloor and Continental Margins

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

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