The dominant control in global sea surface temperature (SST) is
A. upwelling and thermocline zones.
B. the supply of solar insolation.
C. descending air in the subtropics.
D. rising air along the equator.
Answer: B
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Which of these is NOT a process by which air masses are modified?
A) evaporation of water B) heating from below C) cooling from below D) calm winds E) lifting over mountains
Which of the following factors contributes to the general subsidence in the latitude zone 20 degrees to 35 degrees?
A) the Coriolis force B) release of latent heat C) radiation cooling of the air D) both the Coriolis force and radiation cooling
In population studies, the percentage by which a population grows in a year, excluding migration, is referred to as:
A) crude birth rate B) growth rate C) population doubling time D) natural increase rate E) total fertility rate
With one-tenth of the world's population, sub-Saharan Africa had ________ of the world's total HIV positive population and nine-tenths of the world's infected children
A) one-fifth B) a quarter C) half D) two-thirds E) three-quarters