The United States government projects that by 2012, the number of states with water deficits will be:
a 36
b 12
c 50
d 4
The answer was A. 36
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A population density map of North America would suggest that Canadians:
A. Prefer to live on their east coast and west coast. B. Are concentrated in their maritime provinces. C. Generally live within 100 miles of the border with the United States. D. Like living in cold weather climates.
Aquaculture produces very little of the amount, perhaps ten percent, of fish consumed by humans
Indicate whether the statement is true or false
?Match the term with the correct description.
A. ?the catching of unwanted fish B. ?area of ocean needed to sustain the fish consumption of an average person, a nation, or the world based on the weight of fish they consume annually C. ?when it is no longer profitable to continue harvesting a species of fish D. ?smaller marine species such as anchovies, herring, sardines, and shrimp-like krill E. ?the catching of surface-dwelling species such as tuna, mackerel, anchovies, and herring
A rapid change in ocean temperature with a change in depth occurs in the ________
A) barocline B) halocline C) isocline D) pycnocline E) thermocline