Question 1

An echo sounder operates by measuring the time required for a ________.

Accepted Answer

A)  light beam to travel from a satellite at a known altitude to the sea bottom and back
B)  radar beam to travel from a harbour patrol boat to a fuzz-buster on a speeding yacht
C)  radar beam to travel from a ship to the seafloor and back
D)  sound pulse to travel from a ship or survey towfish to the seafloor and backE) A) and D)
F) A) and C)

Question 2

Oceanic ridges are elevated compared to the surrounding ocean floor because ________.

Accepted Answer

A)  newly formed lithosphere is hotter and therefore less dense than the surrounding rocks
B)  the older, colder lithosphere is less dense and tends to rise
C)  the mantle is pushing up the lithosphere along the ridge
D)  of the shield volcanoes that develop due to seafloor spreadingE) None of the above
F) All of the above

Question 3

On active continental margins, at the toe of the continental slope is there an accretionary wedge of deformed sediments, or a gradual continental rise?

Accepted Answer

The answer of On active continental margins, at the toe...

Question 4

A(n)________ marks the site where old, oceanic lithosphere begins its descent into a subduction zone.

Accepted Answer

The answer of A(n)________ marks the site where old, oceanic...

Question 5

Draw a bathymetric (topographic)profile with accurate widths, depths, and angles labelled that spans the regions of the continental slope, rise, and shelf.

Accepted Answer

shelf: 80 kilometres X 130 met...

Question 6

What rock types characterize the lowermost ocean crust and the upper mantle respectively, such as the "fossil Moho" preserved in the ophiolite complex of Western Newfoundland?

Accepted Answer

gabbro and...

Question 7

Graded bedding is ________.

Accepted Answer

A)  a Canadian quality-rating scale for different brands of mattresses
B)  an upwards decrease in clastic particle size within a single sediment layer
C)  an accumulation of sedimentary beds beginning with sandy beds at the bottom and ending with clayey beds at the top
D)  the layering in coral limestone produced by the combined chemical action of living coral animals and submarine, hot spring emissionsE) A) and D)
F) B) and C)

Question 8

What is the name of the valley in the central portion of the diagram below?

Accepted Answer

The answer of What is the name of the valley...

Question 9

What is the magma source for mid-ocean ridge basalt?

Accepted Answer

A)  decompression melting in the shallowest part of the asthenosphere beneath the ridge
B)  by spontaneous melting in mafic magma chambers within oceanic crust
C)  along block faults by frictional heating deep in the oceanic lithosphere
D)  It all comes from Hawaii then flows out laterally along the ridge system.E) B) and C)
F) A) and D)

Question 10

________ are where active volcanism and earthquakes are the rarest.

Accepted Answer

Passive co...

Question 11

Which is the deepest ocean trench?

Accepted Answer

A)  Aleutian
B)  Kurile-Kamchatka
C)  Mariana
D)  Peru-ChileE) C) and D)
F) None of the above

Question 12

How were water depths and seafloor bathymetry (submarine topography) determined by the Challenger surveys?

Accepted Answer

A)  by early deep sea divers
B)  hand thrown and retrieved weighted lead-lines
C)  multi-beam, towed echo sounders
D)  timing the descent of heavy bricks with sand glasses and listening for the echoes with early hydrophonesE) A) and B)
F) B) and C)

Question 13

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases.
-Choose the option that does not fit the pattern.

Accepted Answer

A)  trench
B)  submarine canyon
C)  abyssal plain
D)  seamountE) B) and C)
F) B) and D)

Question 14

Turbidites and siliceous oozes are both biogenous sediments.

Accepted Answer

A) True 
 B)False

Question 15

Many of the seamounts form at or near mid ocean ridges.

Accepted Answer

A) True 
 B)False

Question 16

A(n)________ is the vast, relatively deep, flat, sediment-covered portion of the deep-ocean basin.

Accepted Answer

The answer of A(n)________ is the vast, relatively deep, flat,...

Question 17

On the diagram below, match the features to the correct answer for each one.
a)continental volcanic arc 
b)trench 
c)accretionary wedge

Accepted Answer

The answer of On the diagram below, match the features...

Question 18

You are doing a hydrographic survey by the Sand Heads Light, off the mouth of the Fraser River in very silty green water.You lower a bar to check its reflection and calibrate your sounder.You find that the fresh river water has dropped the speed of sound to 1483 m/sec.If the bottom registers at 15 milliseconds (0.015 sec) , how deep is the top of the Fraser delta? Use the equation: depth (m) = 0.5 * (1500 m/s * total 2-way travel time in sec)

Accepted Answer

A)  11.12 metres
B)  11.25 metres
C)  22.25 metres
D)  2250 metresE) C) and D)
F) A) and B)

Question 19

What was the latest technologic addition to seafloor mapping, developed in response to mapping the ocean floor for national security, resource development, and directing seabed cable and pipeline crossings?

Accepted Answer

A)  airborne sounding methods, by overflying the oceans
B)  fleets of remotely telemetered, miniature drifter buoys
C)  swath echo sounding by mechanical multi-beam sonar
D)  walking it off one step at a time by the "Pirates of the Caribbean"E) B) and D)
F) B) and C)

Question 20

________ sediments represent weathered rock and mineral particles eroded mainly from land areas.

Accepted Answer

A)  Exogenous
B)  Hydrogenous
C)  Terrigenous
D)  BiogenousE) B) and D)
F) C) and D)

Exam 11: The Ocean Floor

Draw a bathymetric (topographic)profile with accurate widths, depths, and angles labelled that spans the regions of the continental slope, rise, and shelf.

Correct Answer
verified
shelf: 80 kilometres X 130 met...
View Answer

What is the name of the valley in the central portion of the diagram below?

Correct Answer
verified

A(n)________ is the vast, relatively deep, flat, sediment-covered portion of the deep-ocean basin.

Correct Answer
verified

Oceanic ridges are elevated compared to the surrounding ocean floor because ________.

Correct Answer
verified

What was the latest technologic addition to seafloor mapping, developed in response to mapping the ocean floor for national security, resource development, and directing seabed cable and pipeline crossings?

Correct Answer
verified

Turbidites and siliceous oozes are both biogenous sediments.

Correct Answer
verified

What is the magma source for mid-ocean ridge basalt?

Correct Answer
verified

Many of the seamounts form at or near mid ocean ridges.

Correct Answer
verified

On active continental margins, at the toe of the continental slope is there an accretionary wedge of deformed sediments, or a gradual continental rise?

Correct Answer
verified

________ are where active volcanism and earthquakes are the rarest.

Correct Answer
verified
Passive co...
View Answer

Correct Answer
verified

How were water depths and seafloor bathymetry (submarine topography) determined by the Challenger surveys?

Correct Answer
verified

What rock types characterize the lowermost ocean crust and the upper mantle respectively, such as the "fossil Moho" preserved in the ophiolite complex of Western Newfoundland?

Correct Answer
verified
gabbro and...
View Answer

An echo sounder operates by measuring the time required for a ________.

Correct Answer
verified

________ sediments represent weathered rock and mineral particles eroded mainly from land areas.

Correct Answer
verified

On the diagram below, match the features to the correct answer for each one. a)continental volcanic arc b)trench c)accretionary wedge

Correct Answer
verified

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Correct Answer
verified

Which is the deepest ocean trench?

Correct Answer
verified

Graded bedding is ________.

Correct Answer
verified

A(n)________ marks the site where old, oceanic lithosphere begins its descent into a subduction zone.

Correct Answer
verified

Exam 11: The Ocean Floor

Draw a bathymetric (topographic)profile with accurate widths, depths, and angles labelled that spans the regions of the continental slope, rise, and shelf.

Correct Answerverifiedshelf: 80 kilometres X 130 met...View AnswerShow Answer

What is the name of the valley in the central portion of the diagram below?

Correct AnswerverifiedShow Answer

A(n)________ is the vast, relatively deep, flat, sediment-covered portion of the deep-ocean basin.

Correct AnswerverifiedShow Answer

Oceanic ridges are elevated compared to the surrounding ocean floor because ________.

Correct AnswerverifiedShow Answer

What was the latest technologic addition to seafloor mapping, developed in response to mapping the ocean floor for national security, resource development, and directing seabed cable and pipeline crossings?

Correct AnswerverifiedShow Answer

Turbidites and siliceous oozes are both biogenous sediments.

Correct AnswerverifiedShow Answer

What is the magma source for mid-ocean ridge basalt?

Correct AnswerverifiedShow Answer

Many of the seamounts form at or near mid ocean ridges.

Correct AnswerverifiedShow Answer

On active continental margins, at the toe of the continental slope is there an accretionary wedge of deformed sediments, or a gradual continental rise?

Correct AnswerverifiedShow Answer

________ are where active volcanism and earthquakes are the rarest.

Correct AnswerverifiedPassive co...View AnswerShow Answer

Correct AnswerverifiedShow Answer

How were water depths and seafloor bathymetry (submarine topography) determined by the Challenger surveys?

Correct AnswerverifiedShow Answer

What rock types characterize the lowermost ocean crust and the upper mantle respectively, such as the "fossil Moho" preserved in the ophiolite complex of Western Newfoundland?

Correct Answerverifiedgabbro and...View AnswerShow Answer

An echo sounder operates by measuring the time required for a ________.

Correct AnswerverifiedShow Answer

________ sediments represent weathered rock and mineral particles eroded mainly from land areas.

Correct AnswerverifiedShow Answer

On the diagram below, match the features to the correct answer for each one. a)continental volcanic arc b)trench c)accretionary wedge

Correct AnswerverifiedShow Answer

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Correct AnswerverifiedShow Answer

Which is the deepest ocean trench?

Correct AnswerverifiedShow Answer

Graded bedding is ________.

Correct AnswerverifiedShow Answer

A(n)________ marks the site where old, oceanic lithosphere begins its descent into a subduction zone.

Correct AnswerverifiedShow Answer

Correct Answer
verified
shelf: 80 kilometres X 130 met...
View Answer

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
Passive co...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
gabbro and...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified