Science unit 3 lesson 2
Salinity measures the amount of sodium chloride dissolved in salt water.
What current type is associated with the sinking of colder, heavier waters?
a) thermohaline currents
d) atmospheric currents
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
Surface currents are generated predominantly by:
d) Both b and c
Ocean currents are the result of all of the following except
mixing of warm water with cold water
temperature and salinity
Which of the following is NOT characteristic of El Niño Southern Oscillation (ENSO)?
high populations of marine fishes, such as anchovies
warming of water in the tropical east Pacific
higher water temperatures
possible coral bleaching
Tides are created by the _______________ gravitational pull. The _______________ to/from the earth, the higher the tide.
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.
Upwelling is _________ during El Nino.