Question 1

Approximately when did the central Atlantic Ocean form?

Accepted Answer

A) four billion years go 
B) two billion years ago 
C) two hundred million years ago 
D) twenty million years ago 
E) two thousand years ago 
A) four billion years go 
B) two billion years ago 
C) two hundred million years ago 
D) twenty million years ago 
E) two thousand years ago

Question 2

Which of the following is a consistent feature of reefs and atolls?

Accepted Answer

A) volcanic islands 
B) passive continental margins 
C) divergent plate boundaries 
D) carbonate rocks and accumulations 
A) volcanic islands 
B) passive continental margins 
C) divergent plate boundaries 
D) carbonate rocks and accumulations

Question 3

Which two continents rifted apart to form the central Atlantic Ocean?

Accepted Answer

A) India and Australia 
B) South America and Antarctica 
C) Europe and Asia 
D) North America and Africa 
E) none of these 
A) India and Australia 
B) South America and Antarctica 
C) Europe and Asia 
D) North America and Africa 
E) none of these

Question 4

What features are NOT recognized on the seafloor near Monterey,California?

Accepted Answer

A) a canyon partly cut into hard granite 
B) faults that cut across the seafloor 
C) a broad continental shelf 
D) a continental slope 
E) all of these features are recognized on the seafloor 
A) a canyon partly cut into hard granite 
B) faults that cut across the seafloor 
C) a broad continental shelf 
D) a continental slope 
E) all of these features are recognized on the seafloor

Question 5

How did the South Atlantic Ocean Form?

Accepted Answer

A) Asia rifted apart from Europe 
B) Africa and North America collided to form the Appalachian Mountains 
C) a piece of California started moving northward up the west coast 
D) South America rifted apart from Africa 
E) none of these 
A) Asia rifted apart from Europe 
B) Africa and North America collided to form the Appalachian Mountains 
C) a piece of California started moving northward up the west coast 
D) South America rifted apart from Africa 
E) none of these

Question 6

This figure shows ages of seafloor.Which of the numbered sites is on the shallowest seafloor,based on its position?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 7

Which of the following is associated with a continental slope?

Accepted Answer

A) submarine canyons 
B) turbidity currents 
C) submarine landslides 
D) all of these 
A) submarine canyons 
B) turbidity currents 
C) submarine landslides 
D) all of these

Question 8

Which of the following letters marks the Sea of Japan?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 9

Which sea is shallow because it is underlain by continental crust?

Accepted Answer

A) Mediterranean Sea 
B) Red Sea 
C) Black Sea 
D) Persian Gulf 
A) Mediterranean Sea 
B) Red Sea 
C) Black Sea 
D) Persian Gulf

Question 10

Where was the oceanic plateau relative to the hot spot 20 million years ago?

Accepted Answer

A) farther away than today 
B) the same distance as today 
C) half the distance as today 
D) on top of the hot spot 
A) farther away than today 
B) the same distance as today 
C) half the distance as today 
D) on top of the hot spot

Question 11

How wide was the narrow sea between the western continent and adjacent volcanic islands 20 million years ago?

Accepted Answer

A) wider than it is today 
B) same width as it is today 
C) a little narrower than it is today 
D) it was much narrower 
A) wider than it is today 
B) same width as it is today 
C) a little narrower than it is today 
D) it was much narrower

Question 12

How do most salt deposits form?

Accepted Answer

A) dense slurries of sediment and water along continental slopes 
B) rapid deposition offshore of deltas,like in the Gulf of Mexico 
C) evaporation of water,such as in restricted seaways 
D) conversion of limestone to dolostone 
A) dense slurries of sediment and water along continental slopes 
B) rapid deposition offshore of deltas,like in the Gulf of Mexico 
C) evaporation of water,such as in restricted seaways 
D) conversion of limestone to dolostone

Question 13

Based on the features of the ocean floor in this figure,which cross section is the most appropriate match?

Accepted Answer

A) cross section A 
B) cross section B 
C) cross section C 
D) cross section D 
A) cross section A 
B) cross section B 
C) cross section C 
D) cross section D

Question 14

On a map showing the age of the seafloor,why are the patterns symmetrical in the Atlantic Ocean but not the Pacific Ocean?

Accepted Answer

A) Spreading along the Atlantic ridge added seafloor to plates on both sides,while subduction has consumed large areas of old oceanic crust in the Pacific. 
B) Subduction occurred at the same rate along the eastern and western sides of the Atlantic,but not in the Pacific. 
C) Subduction has consumed large areas of old oceanic crust in the Atlantic,more than in the Pacific. 
D) Spreading in the Atlantic has been faster than sea-floor spreading in the Pacific 
A) Spreading along the Atlantic ridge added seafloor to plates on both sides,while subduction has consumed large areas of old oceanic crust in the Pacific. 
B) Subduction occurred at the same rate along the eastern and western sides of the Atlantic,but not in the Pacific. 
C) Subduction has consumed large areas of old oceanic crust in the Atlantic,more than in the Pacific. 
D) Spreading in the Atlantic has been faster than sea-floor spreading in the Pacific

Question 15

If you drilled into an oceanic plateau,what would you most likely find?

Accepted Answer

A) a thin layer of oceanic sediment over continental crust 
B) andesitic volcanoes buried by turbidity currents 
C) a normal thickness of oceanic crust overlain by andesitic volcanoes 
D) large amounts of basalt derived from melting in the mantle 
A) a thin layer of oceanic sediment over continental crust 
B) andesitic volcanoes buried by turbidity currents 
C) a normal thickness of oceanic crust overlain by andesitic volcanoes 
D) large amounts of basalt derived from melting in the mantle

Question 16

This map shows plate boundaries in the Caribbean region.Which number is closest to a subduction zone that has formed an island arc?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 17

The deepest parts of the seafloor are:

Accepted Answer

A) mid-ocean ridges 
B) abyssal plain 
C) seamounts 
D) oceanic trenches 
E) continental shelves 
A) mid-ocean ridges 
B) abyssal plain 
C) seamounts 
D) oceanic trenches 
E) continental shelves

Question 18

What was the length of the linear chain of islands 20 million years ago?

Accepted Answer

A) longer than today 
B) same length as today 
C) half as long as today 
D) it did not yet exist 
A) longer than today 
B) same length as today 
C) half as long as today 
D) it did not yet exist

Question 19

What is currently the dominant type of motion along the northern boundary of the Caribbean plate?

Accepted Answer

A) subduction of the Caribbean plate beneath Cuba 
B) subduction of the Gulf of Mexico beneath the Caribbean plate 
C) subduction of the Caribbean plate beneath the volcanoes of Central America 
D) seafloor spreading that is moving North America farther from South America 
E) a long transform fault moving the Caribbean plate eastward relative to North America 
A) subduction of the Caribbean plate beneath Cuba 
B) subduction of the Gulf of Mexico beneath the Caribbean plate 
C) subduction of the Caribbean plate beneath the volcanoes of Central America 
D) seafloor spreading that is moving North America farther from South America 
E) a long transform fault moving the Caribbean plate eastward relative to North America

Question 20

Which of these numbers is on the abyssal plane?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) none of these 
A) 1 
B) 2 
C) 3 
D) 4 
E) none of these

Approximately when did the central Atlantic Ocean form?

Which of the following is a consistent feature of reefs and atolls?

Which two continents rifted apart to form the central Atlantic Ocean?

What features are NOT recognized on the seafloor near Monterey,California?

How did the South Atlantic Ocean Form?

This figure shows ages of seafloor.Which of the numbered sites is on the shallowest seafloor,based on its position?

Which of the following is associated with a continental slope?

Which of the following letters marks the Sea of Japan?

Which sea is shallow because it is underlain by continental crust?

Where was the oceanic plateau relative to the hot spot 20 million years ago?

How wide was the narrow sea between the western continent and adjacent volcanic islands 20 million years ago?

How do most salt deposits form?

Based on the features of the ocean floor in this figure,which cross section is the most appropriate match?

On a map showing the age of the seafloor,why are the patterns symmetrical in the Atlantic Ocean but not the Pacific Ocean?

If you drilled into an oceanic plateau,what would you most likely find?

This map shows plate boundaries in the Caribbean region.Which number is closest to a subduction zone that has formed an island arc?

The deepest parts of the seafloor are:

What was the length of the linear chain of islands 20 million years ago?

What is currently the dominant type of motion along the northern boundary of the Caribbean plate?

Which of these numbers is on the abyssal plane?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Volcanoes and Volcanic Hazards

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

Glaciers, shorelines, and Changing Sea Levels

Weathering, soil, and Unstable Slopes

Streams and Flooding

Water Resources

Energy and Mineral Resources

Geology of the Solar System

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Exam 10: The Seafloor and Continental Margins

Approximately when did the central Atlantic Ocean form?

Which of the following is a consistent feature of reefs and atolls?

Which two continents rifted apart to form the central Atlantic Ocean?

What features are NOT recognized on the seafloor near Monterey,California?

How did the South Atlantic Ocean Form?

This figure shows ages of seafloor.Which of the numbered sites is on the shallowest seafloor,based on its position?

Which of the following is associated with a continental slope?

Which of the following letters marks the Sea of Japan?

Which sea is shallow because it is underlain by continental crust?

Where was the oceanic plateau relative to the hot spot 20 million years ago?

How wide was the narrow sea between the western continent and adjacent volcanic islands 20 million years ago?

How do most salt deposits form?

Based on the features of the ocean floor in this figure,which cross section is the most appropriate match?

On a map showing the age of the seafloor,why are the patterns symmetrical in the Atlantic Ocean but not the Pacific Ocean?

If you drilled into an oceanic plateau,what would you most likely find?

This map shows plate boundaries in the Caribbean region.Which number is closest to a subduction zone that has formed an island arc?

The deepest parts of the seafloor are:

What was the length of the linear chain of islands 20 million years ago?

What is currently the dominant type of motion along the northern boundary of the Caribbean plate?

Which of these numbers is on the abyssal plane?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Volcanoes and Volcanic Hazards

Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

Glaciers, shorelines, and Changing Sea Levels

Weathering, soil, and Unstable Slopes

Streams and Flooding

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters