Science unit 3 lesson 2
Question 1
Salinity measures the amount of sodium chloride dissolved in salt water.
a) True
b) False
Question 2
What current type is associated with the sinking of colder, heavier waters?
a) thermohaline currents
b) gyres
c) thermoclines
d) atmospheric currents
Question 3
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
Question 4
Surface currents are generated predominantly by:
a) wind
b) temperature
c) density
d) Both b and c
Question 5
Ocean currents are the result of all of the following except
wind
mixing of warm water with cold water
cloud formations
temperature and salinity
saltwater 2
Question 6
Which of the following is NOT characteristic of El Niño Southern Oscillation (ENSO)?
high populations of marine fishes, such as anchovies
more flooding
warming of water in the tropical east Pacific
higher water temperatures
possible coral bleaching
Question 7
Tides are created by the _______________ gravitational pull. The _______________ to/from the earth, the higher the tide.
a)
moon's; closer
b)
sun's; farther
c)
moon's; farther
d)
sun's; closer
Question 8
Tides are generated by the gravitational pull of the sun.
True
False
Question 9
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.
Question 10
Upwelling is _________ during El Nino.
a) reduced
b) improved
c) unaffected
d) enhanced
