Question 1

Discuss how a plutonic mafic rock forms and how a volcanic mafic rock forms. Correlate the location of where the rock crystallizes to its extrusive or plutonic status.

Accepted Answer

A plutonic mafic rock crystallizes insid

Question 2

If you visited the Sierra Nevada region where Yosemite National Park exists, the type of metamorphism that created these rocks would have been what? ___________________

Accepted Answer

Regional D

Question 3

Short Answer 
 Explain why conglomerate and shale are both considered to be clastic sedimentary rocks.

Accepted Answer

Both rocks are made up of clas

Question 4

Which of the following would not true about igneous rock chemistry?

Accepted Answer

A)  Igneous rocks are classified based on the percentage of silica that is in the rock 
B)  Felsic igneous rocks contain high percentages of silica 
C)  Mafic igneous rocks contain low percentages of silica but high amounts of iron and magnesium 
D)  Ultramafic igneous rocks contain very low percentages of iron and magnesium 
E)  Intermediate igneous rocks contain intermediate percentages of silica 
A)  Igneous rocks are classified based on the percentage of silica that is in the rock 
B)  Felsic igneous rocks contain high percentages of silica 
C)  Mafic igneous rocks contain low percentages of silica but high amounts of iron and magnesium 
D)  Ultramafic igneous rocks contain very low percentages of iron and magnesium 
E)  Intermediate igneous rocks contain intermediate percentages of silica

Question 5

Explain how clastic and chemical sedimentary rocks are formed differently.

Accepted Answer

Clastic rocks are made from the break-do

Question 6

Which of the following is not a true statement about plutonic rocks?

Accepted Answer

A)  A plutonic rock takes a hundred years to cool and crystallize 
B)  Plutonic rocks are medium to coarsely crystalline meaning that there are interlocking crystals that grew over hundreds of thoughts or even millions of years 
C)  Granite is a plutonic igneous rock that formed inside the Earth's crust 
D)  Granite has interlocking crystals that are clearly visible 
A)  A plutonic rock takes a hundred years to cool and crystallize 
B)  Plutonic rocks are medium to coarsely crystalline meaning that there are interlocking crystals that grew over hundreds of thoughts or even millions of years 
C)  Granite is a plutonic igneous rock that formed inside the Earth's crust 
D)  Granite has interlocking crystals that are clearly visible

Question 7

In order to qualify as a sedimentary rock, it must be lithified which means it has been compacted and cemented.

Accepted Answer

A) True 
 B)False

Question 8

Essay 
 Explain why a geologist would expect to find more granite on continents as compared to basalt.

Accepted Answer

Granite is made of silica which is a lig

Question 9

Which is not a true statement?

Accepted Answer

A)  Ultramafic rocks are commonly made by hot volcanoes in modern time 
B)  Most ultramafic rocks were formed when the first crust of the Earth began to form around 4 billion years ago 
C)  If you find a sample of komatiite in the field, you have discovered an ultramafic lava 
D)  If you find a sample of peridotite in the field, you have discovered an ultramafic plutonic rock that is like granite meaning it has interlocking crystals the cooled under the Earth's surface 
E)  Ultramafic rocks are rich in magnesium and iron and this type of igneous rock makes up most of the upper mantle but is rare in the crust 
A)  Ultramafic rocks are commonly made by hot volcanoes in modern time 
B)  Most ultramafic rocks were formed when the first crust of the Earth began to form around 4 billion years ago 
C)  If you find a sample of komatiite in the field, you have discovered an ultramafic lava 
D)  If you find a sample of peridotite in the field, you have discovered an ultramafic plutonic rock that is like granite meaning it has interlocking crystals the cooled under the Earth's surface 
E)  Ultramafic rocks are rich in magnesium and iron and this type of igneous rock makes up most of the upper mantle but is rare in the crust

Question 10

Completion 
 Cross-sections of ___________ show a well-developed concentric internal structure resulting from the layer-by-layer precipitation of the carbonate minerals ?

Accepted Answer

The answer of Completion 
 Cross-sections of ___________ show a...

Question 11

Which of the following is not a true statement about the hardness of a mineral?

Accepted Answer

A)  If you owned a drilling operation that was drilling into the Earth, you would find out that the temperature within the crust rises approximately 30°C for every kilometer you drill in depth 
B)  Melting of rocks can occur between depths of 100 and 350 kilometers causing magma to form 
C)  The depth of magma melting is important to the minerals that form and ultimately to the chemistry of the igneous rock that is formed 
D)  Quartz crystallizes at temperatures around 1100°C so it is not a common igneous mineral since super hot magma temperatures are currently rare on Earth 
A)  If you owned a drilling operation that was drilling into the Earth, you would find out that the temperature within the crust rises approximately 30°C for every kilometer you drill in depth 
B)  Melting of rocks can occur between depths of 100 and 350 kilometers causing magma to form 
C)  The depth of magma melting is important to the minerals that form and ultimately to the chemistry of the igneous rock that is formed 
D)  Quartz crystallizes at temperatures around 1100°C so it is not a common igneous mineral since super hot magma temperatures are currently rare on Earth

Question 12

If you wanted to find an abundance of halite, you would want to find places where ancient evaporites formed.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is not a true statement?

Accepted Answer

A)  If you were to witness a volcanic eruption, the igneous rocks that would be formed are plutonic rocks 
B)  Volcanic igneous rocks form when magma/lava reach the Earth's surface and cool at the surface 
C)  Plutonic igneous rocks form when magma cools and crystallizes inside the Earth and do not get deposited as lava on the Earth's surface 
D)  Lava cools off in a few days or a few years unless it comes in contact with cold water or ice where it may cool off in hours 
A)  If you were to witness a volcanic eruption, the igneous rocks that would be formed are plutonic rocks 
B)  Volcanic igneous rocks form when magma/lava reach the Earth's surface and cool at the surface 
C)  Plutonic igneous rocks form when magma cools and crystallizes inside the Earth and do not get deposited as lava on the Earth's surface 
D)  Lava cools off in a few days or a few years unless it comes in contact with cold water or ice where it may cool off in hours

Question 14

Explain why Yellowstone Volcano has produced multiple felsic eruptions which violently erupted over the past 2.1 million years and correlate that information to the location of the magma chamber to the surface of the Earth.

Accepted Answer

Yellowstone's magma chamber is located j

Question 15

Which of the following is a true statement about the rock cycle?

Accepted Answer

A)  The Earth's internal heat only produces igneous rocks 
B)  Sedimentary rocks deposited in a basin sink under new overlying rocks and the deeper layers can become metamorphosed by the Earth's heat 
C)  Sedimentary rocks deposited in a basin can be buried deep enough that the rocks become too hot and turn into magma 
D)  Magma may not reach the Earth's surface where it crystallizes and turns into a rock like granite 
E)  Magma may reach the Earth's surface as lava where it crystallizes and turns into lava such as basalt 
A)  The Earth's internal heat only produces igneous rocks 
B)  Sedimentary rocks deposited in a basin sink under new overlying rocks and the deeper layers can become metamorphosed by the Earth's heat 
C)  Sedimentary rocks deposited in a basin can be buried deep enough that the rocks become too hot and turn into magma 
D)  Magma may not reach the Earth's surface where it crystallizes and turns into a rock like granite 
E)  Magma may reach the Earth's surface as lava where it crystallizes and turns into lava such as basalt

Question 16

You can find numerous places in North America to see ultramafic rocks because these rocks are still being made today in very hot magma chambers.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is not a true statement?

Accepted Answer

A)  If you find a piece of rhyolite in the field, it should be light in color because it high in quartz and feldspars 
B)  If you find a piece of basalt in the field, it should be a very light gray color because contains an intermediate level of quartz and feldspars 
C)  If you find a piece of andesite in the field, it should be a gray color 
D)  If you find a piece of ultramafic rock in the field, it will be noticeable more dense than other rocks because it is high in iron and magnesium 
A)  If you find a piece of rhyolite in the field, it should be light in color because it high in quartz and feldspars 
B)  If you find a piece of basalt in the field, it should be a very light gray color because contains an intermediate level of quartz and feldspars 
C)  If you find a piece of andesite in the field, it should be a gray color 
D)  If you find a piece of ultramafic rock in the field, it will be noticeable more dense than other rocks because it is high in iron and magnesium

Question 18

Short Answer 
 Explain what testing a rock with diluted acid tells a geologist about the type of rock she or he has found.

Accepted Answer

If the rock reacts t

Question 19

Explain why there is an extrusive equivalent to a plutonic igneous rock for each igneous rock chemistry group such as rhyolite and granite.

Accepted Answer

There is a magma version (intrusive) and

Question 20

Which of the following is not true regarding the rock cycle

Accepted Answer

A)  A rock can be impacted by rain or the hydrosphere 
B)  A rock can be impacted by air or the atmosphere 
C)  A rock can be impacted by chemicals secreted plants or the biosphere 
D)  As a solid rock is decomposed by processes of weathering, the end result is the formation of sand that can get into rivers and streams 
E)  As a solid rock is decomposed by processes of weathering, clay and other minerals get washed by rain into rivers and are deposited into sedimentary basins 
A)  A rock can be impacted by rain or the hydrosphere 
B)  A rock can be impacted by air or the atmosphere 
C)  A rock can be impacted by chemicals secreted plants or the biosphere 
D)  As a solid rock is decomposed by processes of weathering, the end result is the formation of sand that can get into rivers and streams 
E)  As a solid rock is decomposed by processes of weathering, clay and other minerals get washed by rain into rivers and are deposited into sedimentary basins

Exam 3: Rocks

Discuss how a plutonic mafic rock forms and how a volcanic mafic rock forms. Correlate the location of where the rock crystallizes to its extrusive or plutonic status.

If you visited the Sierra Nevada region where Yosemite National Park exists, the type of metamorphism that created these rocks would have been what? ___________________

Short Answer Explain why conglomerate and shale are both considered to be clastic sedimentary rocks.

Which of the following would not true about igneous rock chemistry?

Explain how clastic and chemical sedimentary rocks are formed differently.

Which of the following is not a true statement about plutonic rocks?

In order to qualify as a sedimentary rock, it must be lithified which means it has been compacted and cemented.

Essay Explain why a geologist would expect to find more granite on continents as compared to basalt.

Which is not a true statement?

Completion Cross-sections of ___________ show a well-developed concentric internal structure resulting from the layer-by-layer precipitation of the carbonate minerals ?

Which of the following is not a true statement about the hardness of a mineral?

If you wanted to find an abundance of halite, you would want to find places where ancient evaporites formed.

Which of the following is not a true statement?

Explain why Yellowstone Volcano has produced multiple felsic eruptions which violently erupted over the past 2.1 million years and correlate that information to the location of the magma chamber to the surface of the Earth.

Which of the following is a true statement about the rock cycle?

You can find numerous places in North America to see ultramafic rocks because these rocks are still being made today in very hot magma chambers.

Which of the following is not a true statement?

Short Answer Explain what testing a rock with diluted acid tells a geologist about the type of rock she or he has found.

Explain why there is an extrusive equivalent to a plutonic igneous rock for each igneous rock chemistry group such as rhyolite and granite.

Which of the following is not true regarding the rock cycle

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