Question 1

Short Answer 
 Explain why the oceanic crust is dominated by basalt.

Accepted Answer

Basalt makes up the

Question 2

Which is not a true statement about minerals?

Accepted Answer

A)  Clastic sedimentary rocks are classified in order of increasing particle size 
B)  Pore space in clastic rocks can be important to humans because water, petroleum, and natural gas can fill those pore spaces 
C)  As sediment accumulates and is buried, this allows for the layer to be compressed by the weight of the overlying layers and this process is called compaction 
D)  Lithification is the process of hardening a rock 
E)  Conglomerate, breccia, sandstone, siltstone, and shale are all examples of clastic sedimentary rocks 
A)  Clastic sedimentary rocks are classified in order of increasing particle size 
B)  Pore space in clastic rocks can be important to humans because water, petroleum, and natural gas can fill those pore spaces 
C)  As sediment accumulates and is buried, this allows for the layer to be compressed by the weight of the overlying layers and this process is called compaction 
D)  Lithification is the process of hardening a rock 
E)  Conglomerate, breccia, sandstone, siltstone, and shale are all examples of clastic sedimentary rocks

Question 3

Which of the following is not a true statement?

Accepted Answer

A)  Any limestone sample you find will be calcareous meaning the rock contains an abundance of the mineral calcite or aragonite 
B)  No limestone sample you find will contain skeletal bris from broken-down shells and other marine organisms with hard body parts 
C)  A good way to test a sample you think is limestone is to place some diluted acid on the rock to see if it fizzes or effervesces 
D)  Limestone reacts to diluted acid because it contains calcite 
A)  Any limestone sample you find will be calcareous meaning the rock contains an abundance of the mineral calcite or aragonite 
B)  No limestone sample you find will contain skeletal bris from broken-down shells and other marine organisms with hard body parts 
C)  A good way to test a sample you think is limestone is to place some diluted acid on the rock to see if it fizzes or effervesces 
D)  Limestone reacts to diluted acid because it contains calcite

Question 4

If you find a metamorphic rock in the field that contains mica crystals that have grown with their flat surfaces perpendicular to the direction of squeezing, what type of metamorphic texture would your rock have?

Accepted Answer

The answer of If you find a metamorphic rock in...

Question 5

Which is not a true statement?

Accepted Answer

A)  75 percent of the continents are covered with sedimentary rocks 
B)  Sedimentary rocks comprise over 15 percent of the Earth's crust 
C)  If you find a conglomerate sample in the field, you have discovered a clastic sedimentary rock 
D)  If you find a coal layer in the field, you have discovered an organic sedimentary rock 
E)  If you find rock salt in the field, you have discovered a chemical sedimentary rock
F) If you find a limestone rock in the field, you have discovered a bioclastic sedimentary rock 
A)  75 percent of the continents are covered with sedimentary rocks 
B)  Sedimentary rocks comprise over 15 percent of the Earth's crust 
C)  If you find a conglomerate sample in the field, you have discovered a clastic sedimentary rock 
D)  If you find a coal layer in the field, you have discovered an organic sedimentary rock 
E)  If you find rock salt in the field, you have discovered a chemical sedimentary rock
F) If you find a limestone rock in the field, you have discovered a bioclastic sedimentary rock

Question 6

If you want to find a lot of basalt in North America, a good place to go visit is Columbia River Plateau Basalts located in the Pacific Northwest.

Accepted Answer

A) True 
 B)False

Question 7

If you find a piece of obsidian in the field, you have discovered an intrusive, plutonic igneous rock meaning it crystallized inside the Earth over a long period of geologic time.

Accepted Answer

A) True 
 B)False

Question 8

Explain why a geologist would expect to find more basalt on ocean floors as compared to granite.

Accepted Answer

Basalt is made of heavier elements such

Question 9

Completion 
 If you were making a clay vase, you would need to heat up the clay material to around 1000°C allowing for what minerals, _________, to decompose and also promoting the growth of new minerals all without melting the solid material.

Accepted Answer

The answer of Completion 
 If you were making a...

Question 10

Which of the following is not a true statement?

Accepted Answer

A)  Rhyolite is very dense and does not weather fast 
B)  Granite is very dense and does not weather fast 
C)  Granite forms steep sheer cliffs in many mountain ranges 
D)  Most obsidian forms from felsic composition 
E)  Yellowstone Volcano has produced multiple felsic eruptions over the past 2.1 million years 
A)  Rhyolite is very dense and does not weather fast 
B)  Granite is very dense and does not weather fast 
C)  Granite forms steep sheer cliffs in many mountain ranges 
D)  Most obsidian forms from felsic composition 
E)  Yellowstone Volcano has produced multiple felsic eruptions over the past 2.1 million years

Question 11

Short Answer 
 Explain how a ripple mark forms and what it tells a geologist when she or he discovered an ancient ripple mark in the field.

Accepted Answer

Ripple marks form in wet areas that have

Question 12

Short Answer 
 Explain why regional dynamothermal metamorphism creates foliated metamorphic rocks.

Accepted Answer

Foliation is formed in regiona

Question 13

Explain why ultramafic rocks are no longer made on the Earth's surface. Correlate that information to why ancient ultramafic volcanoes would not have erupted violently.

Accepted Answer

The Earth's internal temperature was hot

Question 14

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

Accepted Answer

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

Question 15

Which of the following is a true statement about weathering?

Accepted Answer

A)  Weathering process can make dissolved ions such as sodium, calcium, and chloride 
B)  Weathering of solid rock can cause some of the minerals in it to change or dissolve our of a rock 
C)  Most of the dissolved ions from rock travel via rivers to the ocean where marine organisms use the ions to make shells or other hard parts of their bodies 
D)  If you find a rock called limestone, you have found a very rare rock because the geologic conditions to form limestone are very rare 
A)  Weathering process can make dissolved ions such as sodium, calcium, and chloride 
B)  Weathering of solid rock can cause some of the minerals in it to change or dissolve our of a rock 
C)  Most of the dissolved ions from rock travel via rivers to the ocean where marine organisms use the ions to make shells or other hard parts of their bodies 
D)  If you find a rock called limestone, you have found a very rare rock because the geologic conditions to form limestone are very rare

Question 16

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

Accepted Answer

A)  Soil is an example of rocks because it is unconsolidated aggregate of materials 
B)  If you pick up a rock, it will be considered a rock if it is made up of a solid aggregate of one or more minerals 
C)  Igneous rocks form a few hundred kilometers beneath the surface because high enough temperatures are there to melt rock into magma 
D)  Magma rises slowly towards the Earth's surface because it is less dense than the surrounding rock 
A)  Soil is an example of rocks because it is unconsolidated aggregate of materials 
B)  If you pick up a rock, it will be considered a rock if it is made up of a solid aggregate of one or more minerals 
C)  Igneous rocks form a few hundred kilometers beneath the surface because high enough temperatures are there to melt rock into magma 
D)  Magma rises slowly towards the Earth's surface because it is less dense than the surrounding rock

Question 17

Completion 
 If you visited the Great Barrier Reef of Australia, you would be observing a modern-day coral reef environment where _________-forming organisms exist.

Accepted Answer

The answer of Completion 
 If you visited the Great...

Question 18

Completion 
 If you moved to an urban area in Utah such as Salt Lake City, what sedimentary mining resource would be essential for you to build a home?   ______________________________

Accepted Answer

The answer of Completion 
 If you moved to an...

Question 19

Short Answer 
 Explain why a low-grade metamorphic rock would not form in depths of 10 kilometers or greater.

Accepted Answer

Low-grade rocks form in 300°C

Question 20

If you want to find a lot of andesite in North America, a good place to go visit would be the Cascade Mountains of the Pacific Northwest.

Accepted Answer

A) True 
 B)False

Exam 3: Rocks

Short Answer Explain why the oceanic crust is dominated by basalt.

Which is not a true statement about minerals?

Which of the following is not a true statement?

If you find a metamorphic rock in the field that contains mica crystals that have grown with their flat surfaces perpendicular to the direction of squeezing, what type of metamorphic texture would your rock have?

Which is not a true statement?

If you want to find a lot of basalt in North America, a good place to go visit is Columbia River Plateau Basalts located in the Pacific Northwest.

If you find a piece of obsidian in the field, you have discovered an intrusive, plutonic igneous rock meaning it crystallized inside the Earth over a long period of geologic time.

Explain why a geologist would expect to find more basalt on ocean floors as compared to granite.

Completion If you were making a clay vase, you would need to heat up the clay material to around 1000°C allowing for what minerals, _________, to decompose and also promoting the growth of new minerals all without melting the solid material.

Which of the following is not a true statement?

Short Answer Explain how a ripple mark forms and what it tells a geologist when she or he discovered an ancient ripple mark in the field.

Short Answer Explain why regional dynamothermal metamorphism creates foliated metamorphic rocks.

Explain why ultramafic rocks are no longer made on the Earth's surface. Correlate that information to why ancient ultramafic volcanoes would not have erupted violently.

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

Which of the following is a true statement about weathering?

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

Completion If you visited the Great Barrier Reef of Australia, you would be observing a modern-day coral reef environment where _________-forming organisms exist.

Completion If you moved to an urban area in Utah such as Salt Lake City, what sedimentary mining resource would be essential for you to build a home? ______________________________

Short Answer Explain why a low-grade metamorphic rock would not form in depths of 10 kilometers or greater.

If you want to find a lot of andesite in North America, a good place to go visit would be the Cascade Mountains of the Pacific Northwest.

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