Question 1

The western United States has

Accepted Answer

A)  low-density mantle that extends extraordinarily deep. 
B)  high-density mantle very close to the surface. 
C)  low-density mantle close to the surface. 
D)  high-density mantle that extends very deep. 
A)  low-density mantle that extends extraordinarily deep. 
B)  high-density mantle very close to the surface. 
C)  low-density mantle close to the surface. 
D)  high-density mantle that extends very deep.

Question 2

Which of the following surface elevations is clearly underlain by oceanic crust?

Accepted Answer

A)  8.85 km 
B)  0 km (sea level) 
C)  - 0.5 km 
D)  - 5 km 
A)  8.85 km 
B)  0 km (sea level) 
C)  - 0.5 km 
D)  - 5 km

Question 3

How was the Coast Range in Oregon and Washington formed?

Accepted Answer

A)  thrust and uplift of continental crust 
B)  accretion by subduction zones 
C)  as a volcanic island arc 
D)  sea mounts and island volcanoes 
A)  thrust and uplift of continental crust 
B)  accretion by subduction zones 
C)  as a volcanic island arc 
D)  sea mounts and island volcanoes

Question 4

Continents are the product of mountain building at ancient ________ boundaries.

Accepted Answer

A)  transform 
B)  divergent 
C)  convergent 
D)  decorticate 
A)  transform 
B)  divergent 
C)  convergent 
D)  decorticate

Question 5

All past changes in sea level were due to the growth and demise of glaciers.

Accepted Answer

A) True 
 B)False

Question 6

The elevations of continents and oceans vary from each other because

Accepted Answer

A)  oceanic crust is thinner and denser than continental crust. 
B)  oceanic crust is thinner and less dense than continental crust. 
C)  oceanic crust is thicker and denser than continental crust. 
D)  oceanic crust is thicker and less dense than continental crust. 
A)  oceanic crust is thinner and denser than continental crust. 
B)  oceanic crust is thinner and less dense than continental crust. 
C)  oceanic crust is thicker and denser than continental crust. 
D)  oceanic crust is thicker and less dense than continental crust.

Question 7

How does isostasy explain the formation of rift valleys?

Accepted Answer

A)  root decreases under compression 
B)  density decreases under tension 
C)  root decreases under tension 
D)  density decreases under compression 
A)  root decreases under compression 
B)  density decreases under tension 
C)  root decreases under tension 
D)  density decreases under compression

Question 8

Which of the following is not an effect of tension?

Accepted Answer

A)  thrust faults 
B)  normal faults 
C)  decrease in elevation 
D)  shrinking of mountain roots 
A)  thrust faults 
B)  normal faults 
C)  decrease in elevation 
D)  shrinking of mountain roots

Question 9

If Earth's remaining glaciers melt, how would the global sea level change?

Accepted Answer

A)  hardly at all; most of the water would be absorbed by porous land and by increasing size of freshwater lakes and rivers 
B)  the sea level would rise about 8 m 
C)  the sea level would rise about 80 m 
D)  the sea level would rise about 120 m 
A)  hardly at all; most of the water would be absorbed by porous land and by increasing size of freshwater lakes and rivers 
B)  the sea level would rise about 8 m 
C)  the sea level would rise about 80 m 
D)  the sea level would rise about 120 m

Question 10

A model for Earth elevation based only on oceanic crust being thinner than continental crust results in

Accepted Answer

A)  oceanic crust being denser than continental crust. 
B)  continental crust being denser than oceanic crust. 
C)  continental crust and oceanic crust having the same densities. 
D)  reasonable estimates of crustal thickness and crustal densities. 
A)  oceanic crust being denser than continental crust. 
B)  continental crust being denser than oceanic crust. 
C)  continental crust and oceanic crust having the same densities. 
D)  reasonable estimates of crustal thickness and crustal densities.

Question 11

What is the main factor that determines elevation?

Accepted Answer

A)  crust type 
B)  mantle density 
C)  age of rock, such as amount of erosion 
D)  history of rock, such as ice ages and volcanic action 
A)  crust type 
B)  mantle density 
C)  age of rock, such as amount of erosion 
D)  history of rock, such as ice ages and volcanic action

Question 12

The depth of the crust does not depend on

Accepted Answer

A)  the height of the mountain above it. 
B)  the heights of nearby mountains. 
C)  the density of the mantle beneath it. 
D)  the composition of the crust. 
A)  the height of the mountain above it. 
B)  the heights of nearby mountains. 
C)  the density of the mantle beneath it. 
D)  the composition of the crust.

Question 13

What is the ratio of sea to land on Earth?

Accepted Answer

A)  61: 39 
B)  71: 29 
C)  81: 19 
D)  51: 49 
A)  61: 39 
B)  71: 29 
C)  81: 19 
D)  51: 49

Question 14

Far-western North America contains a variety of fault bounded crustal blocks called ________ terranes.

Accepted Answer

A)  accreted 
B)  island arc 
C)  seamount 
D)  ridge 
A)  accreted 
B)  island arc 
C)  seamount 
D)  ridge

Question 15

A model for Earth elevation based on oceanic crust being thinner than continental crust and oceanic crust being denser than continental crust results in

Accepted Answer

A)  continental crust and oceanic crust having the same densities. 
B)  continental and oceanic crust being too thick. 
C)  continental crust being denser than oceanic crust. 
D)  reasonable estimates of crustal thickness and crustal densities. 
A)  continental crust and oceanic crust having the same densities. 
B)  continental and oceanic crust being too thick. 
C)  continental crust being denser than oceanic crust. 
D)  reasonable estimates of crustal thickness and crustal densities.

Question 16

What does the principle of isostasy explain?

Accepted Answer

A)  variations in elevation due to ice pressure and weight on top of the crust 
B)  variations in elevation due to type and thickness of underlying crust 
C)  variations in elevation due to tectonic forces 
D)  variations in elevation due to rock age, sedimentation patterns, and oceanic history 
A)  variations in elevation due to ice pressure and weight on top of the crust 
B)  variations in elevation due to type and thickness of underlying crust 
C)  variations in elevation due to tectonic forces 
D)  variations in elevation due to rock age, sedimentation patterns, and oceanic history

Question 17

The principle of isostasy tells us that the key factor(s) determining the elevation of a floating object is(are)

Accepted Answer

A)  thickness and density. 
B)  thickness only. 
C)  density only. 
D)  the percentage of ice. 
A)  thickness and density. 
B)  thickness only. 
C)  density only. 
D)  the percentage of ice.

Question 18

Put the following steps in the correct sequence according to how one would take a survey reading. 1. The angle between the line sighted to the star and a line drawn directly toward Earth's center permits calculation of latitude. 2. Surveyors sight a telescope on the North Star, which is almost directly above Earth's rotation axis. 3. A table is set up with its level surface perpendicular to a line directed towards Earth's center.

Accepted Answer

A)  1, 2, 3 
B)  2, 1, 3 
C)  3, 2, 1 
D)  3, 1, 2 
A)  1, 2, 3 
B)  2, 1, 3 
C)  3, 2, 1 
D)  3, 1, 2

Question 19

How could the Himalayan Mountains be getting taller?

Accepted Answer

Because the Indian plate is sl

Question 20

How does isostasy relate to active geologic processes?

Accepted Answer

Isostatic adjustments to changes in crus

The western United States has

Which of the following surface elevations is clearly underlain by oceanic crust?

How was the Coast Range in Oregon and Washington formed?

Continents are the product of mountain building at ancient ________ boundaries.

All past changes in sea level were due to the growth and demise of glaciers.

The elevations of continents and oceans vary from each other because

How does isostasy explain the formation of rift valleys?

Which of the following is not an effect of tension?

If Earth's remaining glaciers melt, how would the global sea level change?

A model for Earth elevation based only on oceanic crust being thinner than continental crust results in

What is the main factor that determines elevation?

The depth of the crust does not depend on

What is the ratio of sea to land on Earth?

Far-western North America contains a variety of fault bounded crustal blocks called ________ terranes.

A model for Earth elevation based on oceanic crust being thinner than continental crust and oceanic crust being denser than continental crust results in

What does the principle of isostasy explain?

The principle of isostasy tells us that the key factor(s) determining the elevation of a floating object is(are)

How could the Himalayan Mountains be getting taller?

How does isostasy relate to active geologic processes?

Why Study Earth

Minerals: Building Blocks of the Planet

Rocks and Rock-Forming Processes

Formation of Magma and Igneous Rocks

Formation of Sediment and Sedimentary Rocks

Formation of Metamorphic Rocks

Earth Materials As Time Keepers

Earth Materials As Time Keepers

Making Earth

Motion Inside Earth

Deformation of Rocks

Global Tectonics: Plates and Plumes

Soil Formation and Landscape Stability

Mass Movements: Landscapes in Motion

Streams: Flowing Water Shapes the Landscape

Water Flowing Underground

Glaciers: Cold-Climate Sculptors of Continents

Shorelines: Changing Landscapes Where Land Meets Sea

Wind: a Global Geologic Process

Global Warming: Real Time Change in the Earth System

Filters

Exam 13: Tectonics and Surface Relief

The western United States has

Which of the following surface elevations is clearly underlain by oceanic crust?

How was the Coast Range in Oregon and Washington formed?

Continents are the product of mountain building at ancient ________ boundaries.

All past changes in sea level were due to the growth and demise of glaciers.

The elevations of continents and oceans vary from each other because

How does isostasy explain the formation of rift valleys?

Which of the following is not an effect of tension?

If Earth's remaining glaciers melt, how would the global sea level change?

A model for Earth elevation based only on oceanic crust being thinner than continental crust results in

What is the main factor that determines elevation?

The depth of the crust does not depend on

What is the ratio of sea to land on Earth?

Far-western North America contains a variety of fault bounded crustal blocks called ________ terranes.

A model for Earth elevation based on oceanic crust being thinner than continental crust and oceanic crust being denser than continental crust results in

What does the principle of isostasy explain?

The principle of isostasy tells us that the key factor(s) determining the elevation of a floating object is(are)

How could the Himalayan Mountains be getting taller?

How does isostasy relate to active geologic processes?

Why Study Earth

Minerals: Building Blocks of the Planet

Rocks and Rock-Forming Processes

Formation of Magma and Igneous Rocks

Formation of Sediment and Sedimentary Rocks

Formation of Metamorphic Rocks

Earth Materials As Time Keepers

Earth Materials As Time Keepers

Making Earth

Motion Inside Earth

Deformation of Rocks

Global Tectonics: Plates and Plumes

Soil Formation and Landscape Stability

Mass Movements: Landscapes in Motion

Streams: Flowing Water Shapes the Landscape

Water Flowing Underground

Glaciers: Cold-Climate Sculptors of Continents

Shorelines: Changing Landscapes Where Land Meets Sea

Wind: a Global Geologic Process

Global Warming: Real Time Change in the Earth System

Filters