According to the general circulation of the atmosphere:
a. air sinks at the equator
b. air rises at the equator.
c. air rises at the north and south poles.
d. None of these choices.
b
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Two-thirds of all mercury reaching the atmosphere every year comes from.
A. volcanoes B. rocks and soil. C. toxicology studies. D. industrial facilities. E. methyl mercury.
Complex computer models have been used to model atmospheric temperature from 1900-2000. At which year, and from this point forward, did the model result not match the observed data using only natural factors?
A. 1900 B. 1950 C. 1995 D. 1975
Which of the following is the parent rock of quartzite?
A) Limestone B) Conglomerate C) Granite D) Sandstone
When populations approach their carrying capacity, their resources ________
A) become more scarce and growth rate approaches zero B) increase because populations are decreasing C) increase in supply but are less accessible D) are not a concern as they are usually infinite in supply E) decrease in supply but are more accessible to competitors