Before the advent of streetcars, commuter trains, and subways, the growth of suburbs was
A) constrained by poor transportation.
B) accelerated by excellent transportation.
C) not affected by the lack of transportation.
D) limited by the laws governing building new side streets.
E) accelerated by the lack of rules involving the construction of side roads.
Answer: A
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How much radiant energy will an object emit if its temperature is at absolute zero?
A. none B. the same as at any other temperature C. It depends on the object's chemical composition D. the maximum theoretical amount
_______________ is the destruction of the productive capacity of an area of land.
Fill in the blank(s) with the appropriate word(s).
Which of the following is an example of a persistent pollutant?
A. Bacteria in treated sewage sludge that is spread on fields. B. DDT which is found in soil years after its use but is eventually destroyed by soil bacteria. C. Organophosphate insecticides that kill insects for several days but do not bioaccumulate in food chains. D. Carbon monoxide that breaks down after reacting with oxygen. E. None of these is an example of a persistent pollutant.
Which water mass is characterized by relatively constant temperature and salinity with depth?
a. surface zone b. deep zone c. pycnocline zone d. halocline e. thermocline