Cooling in the upper atmosphere and in near-surface temperatures can be explained by:
A) greenhouse effect.
B) increased albedo.
C) rise in sea-level.
D) increase in ocean temperatures.
Answer: A
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When two tectonic plates converge, one plate is subducted. This means that
A. one plate is forced to slide alongside the other in the same direction. B. one plate is forced to slide alongside the other in the opposite direction. C. one plate is forced over the other. D. one plate is forced beneath the other.
The boundary between air masses having different temperatures (and hence, different densities) is called a(n) ________.
A) isotherm B) front C) fog bank D) cloud
Tropical savanna climate regions are usually not well suited to agriculture
a. True b. False Indicate whether the statement is true or false
Research shows that, on average, low-input polycultures produce higher crop yields than high-input monocultures
Indicate whether the statement is true or false