Question 1

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

Accepted Answer

A)  When magma rises slowly through the Earth's crust before erupting, crystals can form when the rest of the magma remains molten 
B)  The igneous rock texture described in "A" is called porphyry 
C)  If a rock has a porphyry texture, it will have interlocking crystals because it cooled for a long period of geologic time 
D)  Another term of volcanic is extrusive igneous rocks 
A)  When magma rises slowly through the Earth's crust before erupting, crystals can form when the rest of the magma remains molten 
B)  The igneous rock texture described in "A" is called porphyry 
C)  If a rock has a porphyry texture, it will have interlocking crystals because it cooled for a long period of geologic time 
D)  Another term of volcanic is extrusive igneous rocks

Question 2

Short Answer 
 Explain what specific dominance of minerals you would expect to find in granite and identify how the higher percentage of silica contributes to a more explosive volcanic eruption.

Accepted Answer

Quartz and potassium feldspar;

Question 3

Which of the following is not a true statement?

Accepted Answer

A)  Basalt is a mafic igneous rock that contains equal amounts of plagioclase feldspar and pyroxene 
B)  Basalt makes up the oceanic crust while granite makes up the continental crust 
C)  Gabbro is the intrusive or plutonic equivalent of basalt because it has equal amounts of plagioclase feldspar and pyroxene but has interlocking crystals like granite 
D)  Gabbro is common in the deeper parts of the oceanic crust where mafic magma crystallize 
E)  All of the above are true statements 
A)  Basalt is a mafic igneous rock that contains equal amounts of plagioclase feldspar and pyroxene 
B)  Basalt makes up the oceanic crust while granite makes up the continental crust 
C)  Gabbro is the intrusive or plutonic equivalent of basalt because it has equal amounts of plagioclase feldspar and pyroxene but has interlocking crystals like granite 
D)  Gabbro is common in the deeper parts of the oceanic crust where mafic magma crystallize 
E)  All of the above are true statements

Question 4

If you discover a clastic sedimentary rock in the field, you have found the least common type of sedimentary rock known to man.

Accepted Answer

A) True 
 B)False

Question 5

Explain why magma rises toward the Earth's surface and how that contributes to the formation of volcanoes.

Accepted Answer

Magma rise towards the earth's surface b

Question 6

Which of the following is not a true statement?

Accepted Answer

A)  Sedimentary rocks form processes of weathering on pre-existing rocks on the Earth's surface 
B)  Metamorphic rocks form when a rock is heated to the point it melts into magma 
C)  Metamorphic rocks are formed when heat, pressure, or hot water alters any preexisting rock 
D)  Igneous rocks form from magma 
E)  A rock you find in nature is likely not going to be permanently in its current state over all of geologic time due to the rock cycle 
A)  Sedimentary rocks form processes of weathering on pre-existing rocks on the Earth's surface 
B)  Metamorphic rocks form when a rock is heated to the point it melts into magma 
C)  Metamorphic rocks are formed when heat, pressure, or hot water alters any preexisting rock 
D)  Igneous rocks form from magma 
E)  A rock you find in nature is likely not going to be permanently in its current state over all of geologic time due to the rock cycle

Question 7

Explain how a rock you find in the field could have undergone multiple changes in the rock cycle over geologic time.

Accepted Answer

If you find a piece of quartz sandstone,

Question 8

Granite and rhyolite are chemically the same but the location of where the crystallized determines if the rock has a coarse texture or a fine texture.

Accepted Answer

A) True 
 B)False

Question 9

Which is not a true statement?

Accepted Answer

A)  Andesite is a volcanic rock which has an intermediate chemistry between basalt and granite so is typically gray in color 
B)  Basalt is a volcanic rock which has a mafic chemistry and it is typically black in color 
C)  Every type of asbestos is a potent carcinogen regardless if it can blow around or it is woven into a cloth 
D)  Andesite was named after the Andes Mountain Range in South America that has a large concentration of intermediate igneous volcanic rocks 
E)  Diorite is chemically the same as Andesite but it is the plutonic equivalent rock has larger interlocking crystals like granite and gabbro 
A)  Andesite is a volcanic rock which has an intermediate chemistry between basalt and granite so is typically gray in color 
B)  Basalt is a volcanic rock which has a mafic chemistry and it is typically black in color 
C)  Every type of asbestos is a potent carcinogen regardless if it can blow around or it is woven into a cloth 
D)  Andesite was named after the Andes Mountain Range in South America that has a large concentration of intermediate igneous volcanic rocks 
E)  Diorite is chemically the same as Andesite but it is the plutonic equivalent rock has larger interlocking crystals like granite and gabbro

Question 10

Which of the following is not a true statement?

Accepted Answer

A)  If you find a piece of granite, you have discovered a plutonic igneous rock that contains mostly quartz and feldspar 
B)  If you find a piece of rhyolite, you have discovered a volcanic igneous rock that contains mostly quartz and feldspar 
C)  Granite and rhyolite represent the same igneous chemistry 
D)  Granite and rhyolite are different not in their chemistry but in how and where they crystallized and cooled off 
E)  An igneous rock that contains coarse-grained crystals would be considered a volcanic rock 
A)  If you find a piece of granite, you have discovered a plutonic igneous rock that contains mostly quartz and feldspar 
B)  If you find a piece of rhyolite, you have discovered a volcanic igneous rock that contains mostly quartz and feldspar 
C)  Granite and rhyolite represent the same igneous chemistry 
D)  Granite and rhyolite are different not in their chemistry but in how and where they crystallized and cooled off 
E)  An igneous rock that contains coarse-grained crystals would be considered a volcanic rock

Question 11

Which is not a true statement?

Accepted Answer

A)  The most violent and most catastrophic volcanic eruptions in Earth's history involved felsic magmas 
B)  The least violent volcanic eruptions in Earth's history involved ultra-mafic magmas 
C)  The more silica a magma contains, the more viscous or thick it becomes creating a violent eruption because internal pressure builds up inside the volcano 
D)  The less silica a magma contains, the magma remains molten and does not create a violent eruption 
E)  A mafic eruption would be thick and viscous allowing for internal pressure to build up inside the volcano 
A)  The most violent and most catastrophic volcanic eruptions in Earth's history involved felsic magmas 
B)  The least violent volcanic eruptions in Earth's history involved ultra-mafic magmas 
C)  The more silica a magma contains, the more viscous or thick it becomes creating a violent eruption because internal pressure builds up inside the volcano 
D)  The less silica a magma contains, the magma remains molten and does not create a violent eruption 
E)  A mafic eruption would be thick and viscous allowing for internal pressure to build up inside the volcano

Question 12

Short Answer 
 Explain what a parent rock is and how that relates to metamorphism.

Accepted Answer

A parent rock is any sedimenta

Question 13

Which of the following would not be a true statement?

Accepted Answer

A)  If you witness a highly explosive volcanic eruption, its chemistry would higher in silica minerals and lower in temperature 
B)  If you witness a flowing, running lava eruption in Hawaii, its chemistry would be lower in silica and higher in temperature 
C)  The higher temperature for mafic lavas help decrease its density and prevent silica minerals from forming 
D)  All of the above are true statements 
A)  If you witness a highly explosive volcanic eruption, its chemistry would higher in silica minerals and lower in temperature 
B)  If you witness a flowing, running lava eruption in Hawaii, its chemistry would be lower in silica and higher in temperature 
C)  The higher temperature for mafic lavas help decrease its density and prevent silica minerals from forming 
D)  All of the above are true statements

Question 14

Which of the following is not a true statement?

Accepted Answer

A)  Mudstone is made up of tiny clay minerals but is still considered a clastic sedimentary rock 
B)  If you were in a swamp where a lot of peat was forming, this material could turn into coal over geologic time with heat and pressure 
C)  Chert is an organic sedimentary rock made up of very finely crystallize quartz 
D)  If you found halite in the field, you have discovered a chemical sedimentary rock that is an evaporite 
E)  All limestone rocks are clastic sedimentary rocks 
A)  Mudstone is made up of tiny clay minerals but is still considered a clastic sedimentary rock 
B)  If you were in a swamp where a lot of peat was forming, this material could turn into coal over geologic time with heat and pressure 
C)  Chert is an organic sedimentary rock made up of very finely crystallize quartz 
D)  If you found halite in the field, you have discovered a chemical sedimentary rock that is an evaporite 
E)  All limestone rocks are clastic sedimentary rocks

Question 15

Completion 
 If you find a rock in which the coarsest clasts are in its base and the smallest size clasts are on its top, what specific sedimentary structure have you found? ______________________

Accepted Answer

The answer of Completion 
 If you find a rock...

Question 16

Which is not a true statement?

Accepted Answer

A)  Burial metamorphism occurs when sedimentary rocks are buried in a basin that is greater than 5 kilometers in depth 
B)  Temperature and pressure increase within the deeper layers until metamorphism begins 
C)  Burial metamorphism occurs with deformation 
D)  Burial metamorphism will yield nonfoliated metamorphic rocks 
A)  Burial metamorphism occurs when sedimentary rocks are buried in a basin that is greater than 5 kilometers in depth 
B)  Temperature and pressure increase within the deeper layers until metamorphism begins 
C)  Burial metamorphism occurs with deformation 
D)  Burial metamorphism will yield nonfoliated metamorphic rocks

Question 17

The rock cycle states that all rocks undergo changes from igneous, sedimentary, and metamorphic states to another but that most rocks are permanent over geologic time in one of these states.

Accepted Answer

A) True 
 B)False

Question 18

Completion 
 ___________ form in a quiet water environment as compared to ooids that require agitation to roll the grain around.

Accepted Answer

The answer of Completion 
 ___________ form in a quiet...

Question 19

Completion 
 If you find a fossil such as a tracks, trails, and burrows, you have discovered what type of fossil ____________________

Accepted Answer

The answer of Completion 
 If you find a fossil...

Question 20

Completion 
 If you discover a piece of gneiss, it represents what specific level of metamorphic grade? ________

Accepted Answer

The answer of Completion 
 If you discover a piece...

Exam 3: Rocks

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

Short Answer Explain what specific dominance of minerals you would expect to find in granite and identify how the higher percentage of silica contributes to a more explosive volcanic eruption.

Which of the following is not a true statement?

If you discover a clastic sedimentary rock in the field, you have found the least common type of sedimentary rock known to man.

Explain why magma rises toward the Earth's surface and how that contributes to the formation of volcanoes.

Which of the following is not a true statement?

Explain how a rock you find in the field could have undergone multiple changes in the rock cycle over geologic time.

Granite and rhyolite are chemically the same but the location of where the crystallized determines if the rock has a coarse texture or a fine texture.

Which is not a true statement?

Which of the following is not a true statement?

Which is not a true statement?

Short Answer Explain what a parent rock is and how that relates to metamorphism.

Which of the following would not be a true statement?

Which of the following is not a true statement?

Completion If you find a rock in which the coarsest clasts are in its base and the smallest size clasts are on its top, what specific sedimentary structure have you found? ______________________

Which is not a true statement?

The rock cycle states that all rocks undergo changes from igneous, sedimentary, and metamorphic states to another but that most rocks are permanent over geologic time in one of these states.

Completion ___________ form in a quiet water environment as compared to ooids that require agitation to roll the grain around.

Completion If you find a fossil such as a tracks, trails, and burrows, you have discovered what type of fossil ____________________

Completion If you discover a piece of gneiss, it represents what specific level of metamorphic grade? ________

Earth Systems

Minerals

Geologic Time: a Story in the Rocks

Geologic Resources

The Active Earth: Plate Tectonics

Earthquakes and the Earths Structure

Volcanoes and Plutons

Mountains

Weathering, Soil, and Erosion

Fresh Water: Streams, Lakes, Ground Water, and Wetlands

Water Resources

Glaciers and Ice Ages

Deserts and Wind

Ocean Basins

Oceans and Coastlines

The Atmosphere

Energy Balance in the Atmosphere

Moisture, Clouds, and Weather

Climate

Climate Change

Motions in the Heavens

Planets and Their Moons

Stars, Space, and Galaxies

Filters