Question 1

What is a very large (> 100 km² ), discordant pluton, commonly of granitic composition?

Accepted Answer

The answer of What is a very large (> 100...

Question 2

In what texture are mineral grains of roughly equal size and coarse enough to be seen without a microscope or magnifying glass?

Accepted Answer

A)  phaneritic
B)  aphanitic
C)  pegmatitic
D)  porphyriticE) All of the above
F) A) and B)

Question 3

The molten portion of magmas and lavas is made up of ________.

Accepted Answer

A)  complex anion frameworks of oxygen with silicon and aluminum and cation modifiers made up of different amounts of calcium, sodium, iron, magnesium, and potassium
B)  metamorphic fluids
C)  silicate minerals that have already crystallized
D)  solid high pressure forms of water, carbon dioxide, and sulfur dioxideE) A) and B)
F) C) and D)

Question 4

What igneous rock comprises the active volcanoes of Hawaii and Iceland?

Accepted Answer

The answer of What igneous rock comprises the active volcanoes...

Question 5

Which igneous rock or magma has the lowest silica (SiO?) content?

Accepted Answer

A)  granite
B)  basalt
C)  andesite
D)  peridotiteE) B) and D)
F) B) and C)

Question 6

Solidification of magma spans a temperature range of at least ________.

Accepted Answer

The answer of Solidification of magma spans a temperature range...

Question 7

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases.
-Choose the option that does not fit the pattern.

Accepted Answer

A)  granite
B)  basalt
C)  diorite
D)  gabbroE) B) and C)
F) A) and D)

Question 8

________ is a volcanic rock that is extremely vesicular and glassy.

Accepted Answer

A)  Obsidian
B)  Pegmatite
C)  Tuff
D)  PumiceE) B) and C)
F) C) and D)

Question 9

The large variety of igneous rock types indicates a large number of different primary magmas exist.

Accepted Answer

A) True 
 B)False

Question 10

What term denotes the predominant and smaller mineral grains in a porphyritic igneous rock?

Accepted Answer

The answer of What term denotes the predominant and smaller...

Question 11

Which of the following igneous rocks is thought to be common in the Earth's mantle but rare in the crust?

Accepted Answer

A)  pumice
B)  granite
C)  pegmatite
D)  peridotiteE) All of the above
F) A) and D)

Question 12

The classification and nomenclature of igneous rocks is based primarily on ________.

Accepted Answer

A)  Aristotelian logic
B)  colour and weight
C)  mineral composition and proportions along with textures that give environmental conditions of crystallization
D)  where the rock was found and the local names for this in different languagesE) A) and B)
F) C) and D)

Question 13

As melts cool their viscosity increases (they lose their mobility and get stiffer) even before they start to crystallize because ________.

Accepted Answer

A)  all of the sodium and potassium escape
B)  their ions become more disordered
C)  the silica tetrahedra in the melt start to link up and make larger and stronger units
D)  they increase in volumeE) A) and B)
F) A) and C)

Question 14

The most common volcanic rock type is rhyolite.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following has the same mineral composition as andesite?

Accepted Answer

A)  basalt
B)  granite
C)  gabbro
D)  dioriteE) C) and D)
F) B) and C)

Question 16

________ are dissolved in melts at depth but they have a tendency to evolve and vaporize at lower (atmospheric) pressure and drive volcanic processes.

Accepted Answer

A)  Crystals of quartz and feldspar
B)  Silica, sodium, and potassium
C)  Volatiles
D)  Volcanic lavasE) A) and C)
F) C) and D)

Question 17

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases.
-Choose the option that does not fit the pattern.

Accepted Answer

A)  subduction
B)  crystal settling
C)  assimilation
D)  magma mixingE) A) and B)
F) B) and C)

Question 18

Silicate igneous rocks make up the ________.

Accepted Answer

A)  bulk of volcanic mountains but not much else on Earth
B)  bulk of the Earth's crust and mantle
C)  densest rocks and are mainly found in the core
D)  majority of shallow rocks covering the continents but everything deeper is sedimentary and metamorphicE) A) and D)
F) A) and C)

Question 19

Which of the following igneous rock always has a pyroclastic texture?

Accepted Answer

A)  rhyolitic tuff
B)  porphyritic basalt flow
C)  intrusive granite pluton
D)  andesitic lava flowE) All of the above
F) A) and B)

Question 20

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases.
-Choose the option that does not fit the pattern.

Accepted Answer

A)  felsic
B)  intermediate
C)  graphic
D)  maficE) None of the above
F) A) and D)

Exam 3: Igneous Rocks

Which of the following igneous rocks is thought to be common in the Earth's mantle but rare in the crust?

Correct AnswerverifiedShow Answer

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Correct AnswerverifiedShow Answer

Silicate igneous rocks make up the ________.

Correct AnswerverifiedShow Answer

Solidification of magma spans a temperature range of at least ________.

Correct AnswerverifiedShow Answer

The molten portion of magmas and lavas is made up of ________.

Correct AnswerverifiedShow Answer

________ is a volcanic rock that is extremely vesicular and glassy.

Correct AnswerverifiedShow Answer

Which of the following has the same mineral composition as andesite?

Correct AnswerverifiedShow Answer

In what texture are mineral grains of roughly equal size and coarse enough to be seen without a microscope or magnifying glass?

Correct AnswerverifiedShow Answer

________ are dissolved in melts at depth but they have a tendency to evolve and vaporize at lower (atmospheric) pressure and drive volcanic processes.

Correct AnswerverifiedShow Answer

What term denotes the predominant and smaller mineral grains in a porphyritic igneous rock?

Correct AnswerverifiedShow Answer

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Correct AnswerverifiedShow Answer

As melts cool their viscosity increases (they lose their mobility and get stiffer) even before they start to crystallize because ________.

Correct AnswerverifiedShow Answer

What is a very large (> 100 km² ), discordant pluton, commonly of granitic composition?

Correct AnswerverifiedShow Answer

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Correct AnswerverifiedShow Answer

Which igneous rock or magma has the lowest silica (SiO?) content?

Correct AnswerverifiedShow Answer

Which of the following igneous rock always has a pyroclastic texture?

Correct AnswerverifiedShow Answer

The most common volcanic rock type is rhyolite.

Correct AnswerverifiedShow Answer

The classification and nomenclature of igneous rocks is based primarily on ________.

Correct AnswerverifiedShow Answer

What igneous rock comprises the active volcanoes of Hawaii and Iceland?

Correct AnswerverifiedShow Answer

The large variety of igneous rock types indicates a large number of different primary magmas exist.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified