Question 1

Which of these numbers is near a site with active seafloor spreading?

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

Question 2

Which of the following seas was formed when spreading and transform faulting sliced off a sliver of the continent?

Accepted Answer

A) Sea of Japan 
B) Bering Sea 
C) Philippine Sea 
D) Gulf of California 
A) Sea of Japan 
B) Bering Sea 
C) Philippine Sea 
D) Gulf of California

Question 3

In the ocean Investigation in the textbook,which process(es)probably formed islands?

Accepted Answer

A) volcanism associated with a hot spot 
B) volcanism associated with a mid-ocean ridge 
C) fragmentation of continents by long transform faults 
D) back-arc spreading 
E) all of these 
A) volcanism associated with a hot spot 
B) volcanism associated with a mid-ocean ridge 
C) fragmentation of continents by long transform faults 
D) back-arc spreading 
E) all of these

Question 4

What do you think might happen to the oceanic plateau 20 million years into the future?

Accepted Answer

A) It may become much larger than it is today. 
B) It may collide with and become part of the central continent. 
C) It may subside and become part of the abyssal plain. 
D) It may collide with the trench. 
A) It may become much larger than it is today. 
B) It may collide with and become part of the central continent. 
C) It may subside and become part of the abyssal plain. 
D) It may collide with the trench.

Question 5

Which part of the Atlantic Ocean was the most recently formed?

Accepted Answer

A) North Atlantic 
B) Central Atlantic 
C) South Atlantic 
D) Pacific Ocean 
A) North Atlantic 
B) Central Atlantic 
C) South Atlantic 
D) Pacific Ocean

Question 6

How did the Gulf of Mexico form?

Accepted Answer

A) loading of thrust sheets of the Appalachian and Ouachita Mountains 
B) a large meteoroid impact that formed a crater the same size as the present-day gulf 
C) back-arc spreading behind the Lesser Antilles arc 
D) Mesozoic (Jurassic)continental rifting and seafloor spreading 
A) loading of thrust sheets of the Appalachian and Ouachita Mountains 
B) a large meteoroid impact that formed a crater the same size as the present-day gulf 
C) back-arc spreading behind the Lesser Antilles arc 
D) Mesozoic (Jurassic)continental rifting and seafloor spreading

Question 7

Where was seafloor spreading occurring in the Investigation area?

Accepted Answer

A) in the middle of the ocean between two continents 
B) beneath a line of islands in the center of the region 
C) within the central continent 
D) within the eastern continent 
E) all of these 
A) in the middle of the ocean between two continents 
B) beneath a line of islands in the center of the region 
C) within the central continent 
D) within the eastern continent 
E) all of these

Question 8

Which of the following parts of the seafloor are the shallowest?

Accepted Answer

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

Question 9

How wide was the narrow ocean between the central and eastern continents 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 10

Which of these numbers is closest to an oceanic trench?

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

Question 11

Which of the following features are NOT associated with salt structures along the Gulf Coast of the United States?

Accepted Answer

A) a layer of salt deposited during continental rifting 
B) folding and doming of layers above rising masses of salt 
C) puzzling bumps and pits on the seafloor 
D) a steep slope or escarpment marking the front of a large mass of salt 
E) all of these are present in this region 
A) a layer of salt deposited during continental rifting 
B) folding and doming of layers above rising masses of salt 
C) puzzling bumps and pits on the seafloor 
D) a steep slope or escarpment marking the front of a large mass of salt 
E) all of these are present in this region

Question 12

Which of the following sea(s)was formed when subduction jumped or shifted outward from the continent?

Accepted Answer

A) North Sea 
B) Bering Sea 
C) Philippine Sea 
D) Gulf of California 
E) all of these 
A) North Sea 
B) Bering Sea 
C) Philippine Sea 
D) Gulf of California 
E) all of these

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

Which of the following letters marks the Bering Sea and Aleutian Islands off Alaska?

Accepted Answer

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

Question 16

What causes the seafloor to deepen across a typical continental slope?

Accepted Answer

A) thinning of continental crust because of normal faults 
B) a transition from continental crust to oceanic crust 
C) down flexing of oceanic crust because of subduction 
D) deposition of sediment from turbidity currents 
E) a and b only 
A) thinning of continental crust because of normal faults 
B) a transition from continental crust to oceanic crust 
C) down flexing of oceanic crust because of subduction 
D) deposition of sediment from turbidity currents 
E) a and b only

Question 17

What is a popular model for the formation of an atoll?

Accepted Answer

A) a moderate-sized meteoroid forms a circular crater on the seafloor 
B) a volcanic eruption forms a large circular caldera 
C) a volcanic island forms and subsides 
D) a barrier reef becomes buried by volcanic eruptions 
A) a moderate-sized meteoroid forms a circular crater on the seafloor 
B) a volcanic eruption forms a large circular caldera 
C) a volcanic island forms and subsides 
D) a barrier reef becomes buried by volcanic eruptions

Question 18

Which of the following is associated with a typical island arc?

Accepted Answer

A) oceanic trench 
B) subduction 
C) melting in the mantle 
D) ocean-ocean convergence 
E) all of these 
A) oceanic trench 
B) subduction 
C) melting in the mantle 
D) ocean-ocean convergence 
E) all of these

Question 19

Which of the numbered features on this figure is a continental slope?

Accepted Answer

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

Question 20

This figure shows ages of seafloor.Which pair of numbers likely has crust of similar age?

Accepted Answer

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

Which of these numbers is near a site with active seafloor spreading?

Which of the following seas was formed when spreading and transform faulting sliced off a sliver of the continent?

In the ocean Investigation in the textbook,which process(es)probably formed islands?

What do you think might happen to the oceanic plateau 20 million years into the future?

Which part of the Atlantic Ocean was the most recently formed?

How did the Gulf of Mexico form?

Where was seafloor spreading occurring in the Investigation area?

Which of the following parts of the seafloor are the shallowest?

How wide was the narrow ocean between the central and eastern continents 20 million years ago?

Which of these numbers is closest to an oceanic trench?

Which of the following features are NOT associated with salt structures along the Gulf Coast of the United States?

Which of the following sea(s)was formed when subduction jumped or shifted outward from the continent?

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

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

Which of the following letters marks the Bering Sea and Aleutian Islands off Alaska?

What causes the seafloor to deepen across a typical continental slope?

What is a popular model for the formation of an atoll?

Which of the following is associated with a typical island arc?

Which of the numbered features on this figure is a continental slope?

This figure shows ages of seafloor.Which pair of numbers likely has crust of similar age?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

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Sedimentary Environments and Rocks

Deformation and Metamorphism

Geologic Time

Mountains, basins, and Continents

Earthquakes and Earths Interior

Climate, weather, and Their Influences on Geology

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Exam 10: The Seafloor and Continental Margins

Which of these numbers is near a site with active seafloor spreading?

Which of the following seas was formed when spreading and transform faulting sliced off a sliver of the continent?

In the ocean Investigation in the textbook,which process(es)probably formed islands?

What do you think might happen to the oceanic plateau 20 million years into the future?

Which part of the Atlantic Ocean was the most recently formed?

How did the Gulf of Mexico form?

Where was seafloor spreading occurring in the Investigation area?

Which of the following parts of the seafloor are the shallowest?

How wide was the narrow ocean between the central and eastern continents 20 million years ago?

Which of these numbers is closest to an oceanic trench?

Which of the following features are NOT associated with salt structures along the Gulf Coast of the United States?

Which of the following sea(s)was formed when subduction jumped or shifted outward from the continent?

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

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

Which of the following letters marks the Bering Sea and Aleutian Islands off Alaska?

What causes the seafloor to deepen across a typical continental slope?

What is a popular model for the formation of an atoll?

Which of the following is associated with a typical island arc?

Which of the numbered features on this figure is a continental slope?

This figure shows ages of seafloor.Which pair of numbers likely has crust of similar age?

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