The Thermohaline circulation involves
temperature differences in the ocean
saline differences in the ocean.
dense cold, salty water and warm, lighter water.
a and b are correct
a, b, and c are correct
The energy that drives surface ocean currents such as the Gulf Stream (and Florida Current and North Atlantic Current) comes from
the Coriolis effect.
the prevailing winds.
Ocean currents in the Northern hemisphere spin to the ___________ due to the ______________ effect.
a) left trade winds
b) right; trade winds
c) left; coriolis
d) right; coriolis
Saltwater is most dense at:
a) 4 degrees C
b) O degrees C
c) 32 degrees C
d) 98.7 degrees C
Rainfall in the tropics _______________ the salinity of local ocean waters.
c) has no effect on
d) saltwater 2
Tides are created by the _______________ gravitational pull. The _______________ to/from the earth, the higher the tide.
a) moon's; closer
b) sun's; closer
c) sun's; farther
d) moon's; farther
The movement of sand parallel to the shore:
is created by waves approaching at an oblique angle.
is achieved by longshore currents.
is an important reason for the construction of groins (barriers built at right angle to the beach for the purpose of trapping sand).
None of the choices are correct.
is caused by obliquely breaking waves.
is the zigzag movement of sand grains along a beach.
is the debris deposited by waves high on the beach.
both (a) and (b) are correct
both (b) and (c) are correct
Tides are generated by the gravitational pull of the sun.
In an El Niño year:
the eastward flow of Pacific warm water weakens and the flow is reversed and warm water flows towards the Asia.
atmospheric pressure falls over Asia and rises over South America
equatorial trade winds strengthen, and warm water moves eastward toward South and Central America and California.
Coastal upwelling in the eastern Pacific (Western South America) dwindles or stops.
North and South America experience drought due to loss of moisture.
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