Ocean Circulation

Front 1

Surface or wind-driven currents move water primarily in a vertical direction in the ocean.

True or False

Back 1

False

Front 2

Deep ocean currents are driven primarily by _____.

A. density differences

B. lattitude

C. Earth's rotation

D. Wind

E. bathymetry

Back 2

density differences

Front 3

The circular movement of surface water currents driven by the major wind belts are called gyres.

True or False

Back 3

True

Front 4

Westernboundry currents such as the Gulf Stream transport warm water from the tropics towards higher latitudes.

True or False

Back 4

True

Front 5

An eastern boundry current is generally narrow and swift.

True or False

Back 5

False

Front 6

In the Northernhemishere, Ekman transport pushes surface water to the right of the wind direction.

True or False

Back 6

True

Front 7

Surface ocean currents are driven primarily by ______ and modified by ______.

A. wind; gravity and density

B. wind; the croiolis effect

C. latitude; differences in salinity and land

D. density differences; the Croiolis Effect

E. density differences; difference in salinity and temperature

Back 7

wind; the Croiolis effect

Front 8

Equatorial currents are driven by the:

A. Ekman transport

B. Croilis force

C. density

D. Westerlies

E. trade winds

Back 8

trade winds

Front 9

The Ekman spiral is caused by:

A. the wind and the croiolis effect

B. the wind and gravity

C. the pycnocline

D. pressure gradients

E. density differences in the water column

Back 9

the wind and croiolis effect

Front 10

Which of the following is not of the following is NOT an eastern boundry current?

A. Gulf Stream

B. California current

C. Canary current

D. W. Australian current

E. Peru current

Back 10

Gulf Stream

Front 11

In the Southern hemishere, the direction of Ekman transport is always:

A. to the east of the wind direction

B. to the right of the wind direction

C. at a 45° angle from the wind direction

D. to the left of the wind direction

E. perpendicular to the wind direction

Back 11

to the left of the wind direction

Front 12

Which does NOT belong:

A. California current

B. Canary current

C. Gulf Stream

D. North Atlantic current

E. North Equatorial Current in the Atlantic Ocean

Back 12

California current

Front 13

Surface waters are pushed away fromland and replaced by nutrient-rich bottom water through:

A. convergence

B. upwelling

C. land breezes

D. downwelling

E. sea breezes

Back 13

upwelling

Front 14

The main current in Antartic waters is the Antarctic Circumpolar Current, also called the West Wind Drift.

True or False

Back 14

True

Front 15

The El Niño Southern Oscillation can be best described as:

A. relative changes between two differentatmosheric pressure systemsat high altitude

B. the relationship between sea surface tempurature and changing atmosheric pressure

C. variation in wind speed over the Pacific Ocean

D. wind speed and wind direction differences along the equator

E. tidal differences between coastal Peru and Darwin, Australia

Back 15

the relationship between sea surface temperature and changing atmosheric pressure

Front 16

Which does NOT belong:

A. Australian Drought

B. decreased fish stock in coastal Peru

C. Floodingrains in southeastern U.S.

D. Peruvianupwelling stops

E. Strong trade winds

Back 16

strong trade winds

Front 17

Thermohaline circulation is wind driven.

True or False

Back 17

False

Front 18

Which does NOT belong:

A. thermonaline circulation

B. density-driven circulation

C. Antarctic Bottom water

D. Kuroshio current

E. North Atlantic Deep water

Back 18

Kuroshio current