Question 1

What is a path for magma as it solidifies at great depth and then is uplifted slowly toward the surface?

Accepted Answer

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

Question 2

Which of the following changes in conditions could represent melting of continental crust from the introduction of a mafic magma?

Accepted Answer

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

Question 3

Which of the following igneous rocks would be formed by the slowest cooling?

Accepted Answer

A) coarse granite 
B) medium-grained granite 
C) fine-grained granite 
D) volcanic glass 
E) there is not enough information to tell 
A) coarse granite 
B) medium-grained granite 
C) fine-grained granite 
D) volcanic glass 
E) there is not enough information to tell

Question 4

A vesicular 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 5

Which of the following minerals would likely crystallize early from magma?

Accepted Answer

A) mafic minerals 
B) quartz 
C) muscovite 
D) potassium feldspar 
A) mafic minerals 
B) quartz 
C) muscovite 
D) potassium feldspar

Question 6

Which number of this figure indicates transfer of thermal energy by conduction?

Accepted Answer

A) 1,heating of adjacent rocks by a magma 
B) 2,cooling of hot lithosphere by contact with cooler rocks and seawater 
C) 3,heating of the subducted plate by contact with hotter overlying materials 
D) all of these 
A) 1,heating of adjacent rocks by a magma 
B) 2,cooling of hot lithosphere by contact with cooler rocks and seawater 
C) 3,heating of the subducted plate by contact with hotter overlying materials 
D) all of these

Question 7

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 8

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 9

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 10

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

Question 11

Which of the following is true about igneous processes along oceanic divergent boundaries as shown in this figure?

Accepted Answer

A) Oceanic crust moves toward the ridge in a conveyor-belt manner. 
B) Most of the mantle is molten,not solid. 
C) Solid asthenosphere rises as plates move apart. 
D) Magma generated in the crust drips down into the mantle. 
A) Oceanic crust moves toward the ridge in a conveyor-belt manner. 
B) Most of the mantle is molten,not solid. 
C) Solid asthenosphere rises as plates move apart. 
D) Magma generated in the crust drips down into the mantle.

Question 12

The site on the accompanying figure that would most likely form a rock that has a welded texture is:

Accepted Answer

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

Question 13

Which of the following photographs depicts an igneous rock where the magma cooled slowly at first and then had fast cooling?

Accepted Answer

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

Question 14

Which of the following igneous rocks would be formed by the fastest cooling?

Accepted Answer

A) very coarse granite pegmatite 
B) coarse granite 
C) medium-grained granite 
D) fine-grained granite 
E) volcanic glass 
A) very coarse granite pegmatite 
B) coarse granite 
C) medium-grained granite 
D) fine-grained granite 
E) volcanic glass

Question 15

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 16

Which of the following igneous rocks can be composed of fragments?

Accepted Answer

A) tuff 
B) scoria 
C) volcanic breccia 
D) all of these 
A) tuff 
B) scoria 
C) volcanic breccia 
D) all of these

Question 17

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 18

What generally happens when subduction-derived magma encounters thick continental crust?

Accepted Answer

A) most magma reaches the surface with minor modification 
B) the magma solidifies in sheeted dikes with a composition of basalt 
C) the magma interacts with the crust,forming felsic or intermediate compositions 
D) the oceanic crust melts 
A) most magma reaches the surface with minor modification 
B) the magma solidifies in sheeted dikes with a composition of basalt 
C) the magma interacts with the crust,forming felsic or intermediate compositions 
D) the oceanic crust melts

Question 19

An igneous pegmatite indicates that:

Accepted Answer

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

Question 20

Which of the following occurs during a continental collision,after any subduction has ended?

Accepted Answer

A) the descending continental plate gets hotter and decreases in pressure 
B) decreasing pressure causes downgoing crust to melt 
C) volcanoes are widespread above continental collisions 
D) all of these 
E) none of these 
A) the descending continental plate gets hotter and decreases in pressure 
B) decreasing pressure causes downgoing crust to melt 
C) volcanoes are widespread above continental collisions 
D) all of these 
E) none of these

What is a path for magma as it solidifies at great depth and then is uplifted slowly toward the surface?

Which of the following changes in conditions could represent melting of continental crust from the introduction of a mafic magma?

Which of the following igneous rocks would be formed by the slowest cooling?

A vesicular igneous texture indicates that:

Which of the following minerals would likely crystallize early from magma?

Which number of this figure indicates transfer of thermal energy by conduction?

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

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

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

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

Which of the following is true about igneous processes along oceanic divergent boundaries as shown in this figure?

The site on the accompanying figure that would most likely form a rock that has a welded texture is:

Which of the following photographs depicts an igneous rock where the magma cooled slowly at first and then had fast cooling?

Which of the following igneous rocks would be formed by the fastest cooling?

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

Which of the following igneous rocks can be composed of fragments?

Which of the following causes magma to be less viscous?

What generally happens when subduction-derived magma encounters thick continental crust?

An igneous pegmatite indicates that:

Which of the following occurs during a continental collision,after any subduction has ended?

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Exam 5: Igneous Environments

What is a path for magma as it solidifies at great depth and then is uplifted slowly toward the surface?

Which of the following changes in conditions could represent melting of continental crust from the introduction of a mafic magma?

Which of the following igneous rocks would be formed by the slowest cooling?

A vesicular igneous texture indicates that:

Which of the following minerals would likely crystallize early from magma?

Which number of this figure indicates transfer of thermal energy by conduction?

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

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

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

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

Which of the following is true about igneous processes along oceanic divergent boundaries as shown in this figure?

The site on the accompanying figure that would most likely form a rock that has a welded texture is:

Which of the following photographs depicts an igneous rock where the magma cooled slowly at first and then had fast cooling?

Which of the following igneous rocks would be formed by the fastest cooling?

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

Which of the following igneous rocks can be composed of fragments?

Which of the following causes magma to be less viscous?

What generally happens when subduction-derived magma encounters thick continental crust?

An igneous pegmatite indicates that:

Which of the following occurs during a continental collision,after any subduction has ended?

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