Light and variable winds—which caused difficulties for mariners in the days of sailing ships—occur under the
A) subpolar low and equatorial low.
B) subpolar low and subtropical high.
C) equatorial low and subtropical high.
D) equatorial low and subpolar low.
C
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Distribution of potential evapotranspiration during the year:
An important agricultural hearth is
A) southeast Asia. B) south and central America. C) sub-Saharan Africa. D) northern China. E) All of these are important agricultural hearths.
The Bergeron-Wegener process depends upon
A) ice crystals growing at the expense of water droplets. B) the fact that ice has a higher vapor pressure than water. C) the temperature being above freezing in the cloud. D) all of the above E) none of the above
Judge the following sentence according to the criteria given below:
The dramatic and rapid climate change that is occurring on our planet cannot be explained by variations in the eccentricity of Earth's orbit BECAUSE this variation has a cycle of about 100,000 years. A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.