Question 1

Which of these numbers has the thinnest sequence of marine sediments?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  none of theseF) C) and D)
G) A) and E)

Question 2

Which of these numbered features is on the continental slope?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  none of theseF) C) and E)
G) A) and D) B

Question 3

Most oceanic islands and seamounts are:

Accepted Answer

A)  small pieces rifted apart from continents
B)  places where the seafloor has been buckled upward by convergence
C)  constructed by volcanic eruptions that first occur under water
D)  large fan-shaped mounds deposited by turbidity currentsE) B) and C)
F) C) and D) C

Question 4

Which of these numbered features is an atoll?

Accepted Answer

A)  1
B)  2
C)  3
D)  all of these
E)  none of theseF) B) and C)
G) A) and B)

Question 5

These globes show the position of the continents and ocean basins at various times in the past.What is the correct order of these globes,from oldest to youngest?

Accepted Answer

A)  1,2,3,4
B)  1,4,3,2
C)  4,3,2,1
D)  4,3,1,2
E)  4,1,3,2F) A) and D)
G) A) and E)

Question 6

This figure shows a northwest-southeast line of islands and seamounts near Hawaii.If location 3 has the oldest rocks and Hawaii (1) has the youngest rocks,which way is the plate moving with respect to the hot spot?

Accepted Answer

A)  northwest
B)  southeast
C)  northwest and southeast
D)  it is not moving in a consistent directionE) A) and B)
F) C) and D) A

Question 7

Which of the following are associated with turbidity currents?

Accepted Answer

A)  a dense slurry of water and sediment that moves downhill
B)  submarine canyons
C)  submarine fans
D)  graded beds
E)  all of theseF) C) and E)
G) A) and D)

Question 8

What processes can occur in front of or behind some island arcs?

Accepted Answer

A)  trench rollback or back-arc rifting
B)  fold and thrust belts in the mountains,and formation of a continental plateau
C)  formation of an oceanic plateau related to subduction
D)  all of theseE) A) and B)
F) B) and D)

Question 9

Which of the following is associated with a fast-spreading ridge?

Accepted Answer

A)  rates of about 10 centimeters per year or more
B)  a broad ridge because the rocks remain hotter farther from the center of spreading
C)  less of a deep central rift than in a slow spreading ridge
D)  all of theseE) C) and D)
F) B) and C)

Question 10

If you wanted to locate hot spots on Earth,which of the following would NOT be good place to look?

Accepted Answer

A)  the volcanically active end of a linear island chain
B)  clusters of volcanically active islands
C)  Hawaii and the Galapagos
D)  all of these would be good placesE) B) and C)
F) A) and C)

Question 11

Which of the following seas was formed by rifting or seafloor spreading?

Accepted Answer

A)  North Sea
B)  Red Sea
C)  Persian Gulf
D)  Baltic SeaE) All of the above
F) A) and B)

Question 12

What is the ultimate source of food for animals living around deep-sea hydrothermal vents?

Accepted Answer

A)  sunlight and photosynthesis
B)  the decay of creatures that float on the ocean surface and settle to the bottom
C)  nuclear energy from the heated uranium-rich rocks
D)  bacteria that break down hydrogen sulfideE) A) and D)
F) A) and C)

Question 13

What setting has the thinnest cover of sediment in the oceans?

Accepted Answer

A)  mid-ocean ridges
B)  abyssal plain
C)  oceanic trenches
D)  continental shelves and slopes along passive marginsE) A) and D)
F) All of the above

Question 14

What feature is on the seafloor near Monterey,California?

Accepted Answer

A)  an active subduction zone that causes earthquakes
B)  an active mid-ocean ridge that has opened up a rift on the continental margin
C)  a large submarine canyon and a number of smaller ones
D)  a circular scar interpreted to represent a huge impact crater
E)  none of theseF) B) and C)
G) B) and E)

Question 15

This map shows plate boundaries in the Caribbean region.Which number is closest to a transform boundary?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and E)
G) None of the above

Question 16

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 circularE) All of the above
F) A) and C)

Question 17

What occurs near black smokers?

Accepted Answer

A)  circular features (called chimneys) form,composed of sulfide and sulfate minerals
B)  heated fresh water is derived from the land
C)  organic-rich shale burns in the subsurface
D)  coal-rich layers burn in the subsurface
E)  none of theseF) C) and D)
G) A) and B)

Question 18

This map shows plate boundaries in the Caribbean region.Which number is in the Gulf of Mexico?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) B) and D)
G) D) and E)

Question 19

Which of the following is NOT a way in which we map and investigate the seafloor?

Accepted Answer

A)  bouncing sound waves from a ship off the bottom
B)  drilling holes into the seafloor from ships
C)  using satellites to observe the sea surface
D)  conducting seismic surveys to investigate rock layers
E)  we use all of these techniquesF) All of the above
G) C) and E)

Question 20

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 todayE) A) and C)
F) None of the above

Exam 10: The Seafloor and Continental Margins

Which of these numbers has the thinnest sequence of marine sediments?

Correct AnswerverifiedShow Answer

Which of these numbered features is on the continental slope?

Correct AnswerverifiedB

Most oceanic islands and seamounts are:

Correct AnswerverifiedC

Which of these numbered features is an atoll?

Correct AnswerverifiedShow Answer

These globes show the position of the continents and ocean basins at various times in the past.What is the correct order of these globes,from oldest to youngest?

Correct AnswerverifiedShow Answer

This figure shows a northwest-southeast line of islands and seamounts near Hawaii.If location 3 has the oldest rocks and Hawaii (1) has the youngest rocks,which way is the plate moving with respect to the hot spot?

Correct AnswerverifiedA

Which of the following are associated with turbidity currents?

Correct AnswerverifiedShow Answer

What processes can occur in front of or behind some island arcs?

Correct AnswerverifiedShow Answer

Which of the following is associated with a fast-spreading ridge?

Correct AnswerverifiedShow Answer

If you wanted to locate hot spots on Earth,which of the following would NOT be good place to look?

Correct AnswerverifiedShow Answer

Which of the following seas was formed by rifting or seafloor spreading?

Correct AnswerverifiedShow Answer

What is the ultimate source of food for animals living around deep-sea hydrothermal vents?

Correct AnswerverifiedShow Answer

What setting has the thinnest cover of sediment in the oceans?

Correct AnswerverifiedShow Answer

What feature is on the seafloor near Monterey,California?

Correct AnswerverifiedShow Answer

This map shows plate boundaries in the Caribbean region.Which number is closest to a transform boundary?

Correct AnswerverifiedShow Answer

Island arcs are curved because:

Correct AnswerverifiedShow Answer

What occurs near black smokers?

Correct AnswerverifiedShow Answer

This map shows plate boundaries in the Caribbean region.Which number is in the Gulf of Mexico?

Correct AnswerverifiedShow Answer

Which of the following is NOT a way in which we map and investigate the seafloor?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified