Question 1

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 2

Rock units beneath the seafloor can be imaged with sound waves using a method called:

Accepted Answer

A)  seismic-reflection profiling 
B)  magnetic profiling 
C)  bounce profiling 
D)  physical profiling 
A)  seismic-reflection profiling 
B)  magnetic profiling 
C)  bounce profiling 
D)  physical profiling

Question 3

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

Question 4

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 5

Which of the following places would NOT be a good place to visit a reef?

Accepted Answer

A)  shallow seas that are relatively free of suspended sediment 
B)  the area offshore of northeastern Australia 
C)  the Caribbean 
D)  islands in the southwestern Pacific Ocean 
E)  shallow, clear waters off Iceland 
A)  shallow seas that are relatively free of suspended sediment 
B)  the area offshore of northeastern Australia 
C)  the Caribbean 
D)  islands in the southwestern Pacific Ocean 
E)  shallow, clear waters off Iceland

Question 6

Which of the following features is NOT present near the present-day Caribbean?

Accepted Answer

A)  a subduction zone 
B)  an island arc 
C)  a long transform fault 
D)  reefs 
E)  all of these are present 
A)  a subduction zone 
B)  an island arc 
C)  a long transform fault 
D)  reefs 
E)  all of these are present

Question 7

What is the source of energy for giant worm tubes and clams that live at hydrothermal vents?

Accepted Answer

A)  Bacteria that break down H2S 
B)  Plants that grow on the seafloor 
C)  Sunlight 
A)  Bacteria that break down H2S 
B)  Plants that grow on the seafloor 
C)  Sunlight

Question 8

What has happened to the Pacific Ocean in the last 200 million years?

Accepted Answer

A)  it has become deeper as the rate of seafloor spreading increased 
B)  it became wider because of seafloor spreading 
C)  it became smaller as the Atlantic Ocean opened 
D)  it remained unchanged in size 
E)  none of these 
A)  it has become deeper as the rate of seafloor spreading increased 
B)  it became wider because of seafloor spreading 
C)  it became smaller as the Atlantic Ocean opened 
D)  it remained unchanged in size 
E)  none of these

Question 9

Island arcs are curved because:

Accepted Answer

A)  the shapes of the continents were arcuate as they rifted apart 
B)  the shape of the mid-ocean ridge matches the shape of the continents 
C)  Earth is a sphere, not a flat plane 
D)  most terranes added to the continental margin are circular 
A)  the shapes of the continents were arcuate as they rifted apart 
B)  the shape of the mid-ocean ridge matches the shape of the continents 
C)  Earth is a sphere, not a flat plane 
D)  most terranes added to the continental margin are circular

Question 10

These globes show the position of the continents and ocean basins at various times in the past. Which of these represents the youngest time?

Accepted Answer

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

Question 11

Which of the following letters marks the Red Sea?

Accepted Answer

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

Question 12

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 13

How wide do you think the narrow ocean between the central and eastern continents will be 20 million years in the future?

Accepted Answer

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

Question 14

Which of these numbers is near a continental shelf?

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 15

What rock type forms oceanic plateaus?

Accepted Answer

A)  basalt 
B)  granite 
C)  rhyolite 
A)  basalt 
B)  granite 
C)  rhyolite

Question 16

Subduction zones in the open ocean produce a an):

Accepted Answer

A)  island arc 
B)  abyssal plain 
C)  mid-ocean ridge 
A)  island arc 
B)  abyssal plain 
C)  mid-ocean ridge

Question 17

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 18

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 19

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 20

Which of the following is associated with mid-ocean ridges?

Accepted Answer

A)  a great thickness of oceanic sediment trapped within the central rift 
B)  very smooth topography as a result of the sedimentary cover 
C)  melting of the entire thickness of the asthenosphere to produce magma 
D)  compression that buckles the crust forming the ridge 
E)  none of these 
A)  a great thickness of oceanic sediment trapped within the central rift 
B)  very smooth topography as a result of the sedimentary cover 
C)  melting of the entire thickness of the asthenosphere to produce magma 
D)  compression that buckles the crust forming the ridge 
E)  none of these

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

Rock units beneath the seafloor can be imaged with sound waves using a method called:

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

Which of these numbers is closest to an oceanic trench?

Which of the following places would NOT be a good place to visit a reef?

Which of the following features is NOT present near the present-day Caribbean?

What is the source of energy for giant worm tubes and clams that live at hydrothermal vents?

What has happened to the Pacific Ocean in the last 200 million years?

Island arcs are curved because:

These globes show the position of the continents and ocean basins at various times in the past. Which of these represents the youngest time?

Which of the following letters marks the Red Sea?

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

How wide do you think the narrow ocean between the central and eastern continents will be 20 million years in the future?

Which of these numbers is near a continental shelf?

What rock type forms oceanic plateaus?

Subduction zones in the open ocean produce a an):

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

How did the Gulf of Mexico form?

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

Which of the following is associated with mid-ocean ridges?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Volcanoes and Volcanic Hazards

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

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

Exam 10: Seafloor and Continental Margins

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

Rock units beneath the seafloor can be imaged with sound waves using a method called:

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

Which of these numbers is closest to an oceanic trench?

Which of the following places would NOT be a good place to visit a reef?

Which of the following features is NOT present near the present-day Caribbean?

What is the source of energy for giant worm tubes and clams that live at hydrothermal vents?

What has happened to the Pacific Ocean in the last 200 million years?

Island arcs are curved because:

These globes show the position of the continents and ocean basins at various times in the past. Which of these represents the youngest time?

Which of the following letters marks the Red Sea?

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

How wide do you think the narrow ocean between the central and eastern continents will be 20 million years in the future?

Which of these numbers is near a continental shelf?

What rock type forms oceanic plateaus?

Subduction zones in the open ocean produce a an):

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

How did the Gulf of Mexico form?

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

Which of the following is associated with mid-ocean ridges?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Volcanoes and Volcanic Hazards

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

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