Question 1

A convergence of water occurs at the eastern side of each of the main ocean basins as a result of Ekman transport.

Accepted Answer

A) True 
 B)False

Question 2

In areas of downwelling, there is not likely to be a near-surface

Accepted Answer

A)   halocline.
B)   pycnocline.
C)   thermocline.
D)   All of these are correct.
E)   None of these are correct.F) All of the above
G) A) and B)

Question 3

The Ekman spiral causes current speed to increase with depth.

Accepted Answer

A) True 
 B)False

Question 4

The sea surface at the center of the Sargasso Sea is depressed.

Accepted Answer

A) True 
 B)False

Question 5

Density of Mediterranean Intermediate Water is influenced more by salinity than temperature.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is NOT true about the influence of Ekman Transport on surface currents?

Accepted Answer

A)   The effect extends to a depth of approximately 100 to 150m below sea level.
B)   The average flow of water is 90 degrees to the direction of wind.
C)   Each subsequent layer of water moves more quickly than the one above it.
D)   Surface waters move 45 degrees to the direction of wind.
E)   All of these statements are true.F) None of the above
G) A) and B)

Question 7

A doppler current meter shows an increase in sound frequency if the water flow is

Accepted Answer

A)   moving away from the meter.
B)   moving toward the meter.
C)   moving around the meter.
D)   increasing.
E)   decreasing.F) A) and C)
G) A) and E)

Question 8

Oil tankers coming from the Persian Gulf to the U.S. use the ________ current along the east coast of Africa.

Accepted Answer

A)   Canary
B)   Guinea
C)   Agulhas
D)   Benguela
E)   South EquatorialF) A) and E)
G) All of the above

Question 9

The Indian Ocean gyre rotates counterclockwise.

Accepted Answer

A) True 
 B)False

Question 10

Increasing salinity increases density.

Accepted Answer

A) True 
 B)False

Question 11

Eddies are found at all depths of the oceans.

Accepted Answer

A) True 
 B)False

Question 12

A good example of thermohaline circulation is found

Accepted Answer

A)   in equatorial regions.
B)   in the central South Pacific.
C)   close to Antarctica.
D)   along the east coast of the U.S.
E)   in the Gulf of Mexico.F) C) and D)
G) B) and E)

Question 13

Water of a lower density usually lies below water of a greater density.

Accepted Answer

A) True 
 B)False

Question 14

The North Atlantic current is produced by the

Accepted Answer

A)   northeast trade winds.
B)   southeast trade winds.
C)   prevailing westerlies.
D)   polar easterlies.
E)   seasonal monsoon.F) C) and D)
G) B) and D)

Question 15

Which of the following is the most common range of speeds for surface currents?

Accepted Answer

A)   0.1 to 0.2 knots
B)   0.25 to 1.0 knots
C)   3 to 5 knots
D)   10 to 15 knots
E)   100 to 150 knotsF) A) and D)
G) A) and E)

Question 16

Wind-driven surface currents move at a speed that is ________ the average driving wind speed.

Accepted Answer

A)   the same as
B)   one tenth
C)   one one-hundredth
D)   twice
E)   None of these are correct; there is no relationship.F) A) and D)
G) A) and B)

Question 17

In the Northern Hemisphere, the water surface of the open ocean moves

Accepted Answer

A)   at right angles to the wind.
B)   against the wind.
C)   parallel to the wind.
D)   45 degrees to the right of the wind.
E)   45 degrees to the left of the wind.F) C) and E)
G) A) and E)

Question 18

In the Southern Hemisphere the speed of the wind-driven water _______ with depth and the water moves to the _______ of the wind.

Accepted Answer

A)   increases; right
B)   increases; left
C)   decreases; right
D)   decreases; left
E)   does not change; leftF) B) and C)
G) C) and D)

Question 19

Which current flows south along the west coast of the U.S.?

Accepted Answer

A)   North Pacific
B)   California
C)   Japanese
D)   Gulf Stream
E)   KuroshioF) B) and C)
G) None of the above

Question 20

Layering in the ocean occurs because

Accepted Answer

A)   surface processes form water layers of differing combinations of salinity and temperature.
B)   processes at depth add and subtract salt and heat.
C)   atmospheric processes control conditions at the surface.
D)   All of these are correct.
E)   surface processes form water layers of differing combinations of salinity and temperature and atmospheric processes control conditions at the surface.F) C) and D)
G) All of the above

Exam 7: Ocean Structure and Circulation

The Ekman spiral causes current speed to increase with depth.

Correct AnswerverifiedShow Answer

In areas of downwelling, there is not likely to be a near-surface

Correct AnswerverifiedShow Answer

Oil tankers coming from the Persian Gulf to the U.S. use the ________ current along the east coast of Africa.

Correct AnswerverifiedShow Answer

The Indian Ocean gyre rotates counterclockwise.

Correct AnswerverifiedShow Answer

Density of Mediterranean Intermediate Water is influenced more by salinity than temperature.

Correct AnswerverifiedShow Answer

Wind-driven surface currents move at a speed that is ________ the average driving wind speed.

Correct AnswerverifiedShow Answer

In the Northern Hemisphere, the water surface of the open ocean moves

Correct AnswerverifiedShow Answer

A doppler current meter shows an increase in sound frequency if the water flow is

Correct AnswerverifiedShow Answer

The sea surface at the center of the Sargasso Sea is depressed.

Correct AnswerverifiedShow Answer

Which of the following is NOT true about the influence of Ekman Transport on surface currents?

Correct AnswerverifiedShow Answer

The North Atlantic current is produced by the

Correct AnswerverifiedShow Answer

Water of a lower density usually lies below water of a greater density.

Correct AnswerverifiedShow Answer

Increasing salinity increases density.

Correct AnswerverifiedShow Answer

Which of the following is the most common range of speeds for surface currents?

Correct AnswerverifiedShow Answer

Eddies are found at all depths of the oceans.

Correct AnswerverifiedShow Answer

Layering in the ocean occurs because

Correct AnswerverifiedShow Answer

A good example of thermohaline circulation is found

Correct AnswerverifiedShow Answer

A convergence of water occurs at the eastern side of each of the main ocean basins as a result of Ekman transport.

Correct AnswerverifiedShow Answer

In the Southern Hemisphere the speed of the wind-driven water _______ with depth and the water moves to the _______ of the wind.

Correct AnswerverifiedShow Answer

Which current flows south along the west coast of the U.S.?

Correct AnswerverifiedShow Answer

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In the Southern Hemisphere the speed of the wind-driven water _ with depth and the water moves to the _ of the wind.

Correct Answer
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