The sinuous, branching channels that characterize a salt marsh result from
A) animal paths through the marsh. B) the ebb and flow of tides.
C) manmade drainage canals. D) storm tracks.
B
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The wave you surf on in California may have come from the middle of the Pacific. What has been transmitted across the ocean basin?
a. a surface current b. wind c. energy d. water
Thousands of cases of lung cancer occur in a two-year period in a city outside of Kentucky, at rates that are double that seen in other cities in the United States. Scientists working in that region assume that
A) there is something unique to the region that causing these unusually high rates. B) the medical reports from the area are incorrect. C) government policies and regulations are most likely the cause of this increase in cancer. D) this is most likely just an unlucky occurrence.
Which of the following is TRUE?
A) The population of the United States will double in the next 20 years. B) Thomas Malthus was absolutely correct about population behavior. C) The overall rate of world population growth is slowing down. D) Demographic transition theory is now known to be completely false. E) World population will decrease by 50% by 2100.
When does a cone of depression form?
A. When withdrawal is less than recharge B. When withdrawal exceeds recharge C. When withdrawal equals recharge