The El Niño-Southern Oscillation
A) A north-south fluctuation of high and low pressure zones in the North Atlantic Ocean.
B) is a periodic shift of high and low pressure zones over the western and eastern Pacific, respectively, usually occurring every 2 to 12 years.
C) occurs every year around Christmas time in the southern Pacific Ocean.
D) is a pattern of sea surface, air pressure, and wind shifts between the northern and tropical western Pacific.
B
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During combustion, the oxygen atoms of oxygen molecules
A. become oxidized. B. gain a negative charge. C. remain neutral. D. gain a positive charge.
Which of the following was NOT a root cause of the Arab Spring uprisings which began in 2010?
A) limited opportunities for democracy and free elections B) government campaigns to curtail Islamist movements C) widespread poverty and unemployment, especially among young people D) widespread government corruption E) rapidly rising food prices
Labeling
A. B. In the accompanying oxygen sag curve, choose the zone in which the breakdown of degradable wastes by bacteria starts to deplete the dissolved oxygen. C. In the accompanying oxygen sag curve, choose the zone in which population of organisms with high oxygen requirements will most likely be eliminated.
If you were standing on top of a high mid-Pacific island at 15° north latitude, from which direction would you expect the wind to come? (Hint: Don't forget to consider the Coriolis effect!)
A) north B) south C) northwest D) northeast