If all ice sheets were to melt, sea level would ________.
A. remain unchanged
B. rise by as much as 40 meters
C. fall by as much as 17 meters
D. rise by over 60 meters
E. fall by over 130 meters
Answer: D
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Herbicides would be most useful in combating ________
A) weeds that infest our agricultural fields B) bacteria, such as Salmonella, which sometimes contaminate meat C) mosquitoes that spread malaria in tropical rain forests D) fungi that attack plant roots
_______________ is black or brownish black, contains significant amounts of calcium and iron, and flows fluidly
Fill in the blank with correct word.
Central place theory explains the relative size and spacing of urban centers based on
A) markets and consumer behavior. B) government planning. C) cultural differences. D) natural resources. E) urban ecology.
The annual amount of littoral drift on the eastern seaboard of the United States is on the order of:
a. hundreds of cubic yards of sand. b. thousands of cubic yards of sand. c. tens of thousands of cubic yards of sand. d. hundreds of thousands of cubic yards of sand. e. millions of cubic yards of sand