The image shows the Mid-Atlantic Ridge, a submarine volcanic mountain belt that is a key location in the process of
A. land bridges.
B. seafloor spreading.
C. South Atlantic drift.
D. continental drift.
Answer: B
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At low latitudes, the ________ is a zone of rapid temperature change over a relatively short depth. It is associated with a similar depth zone marked by a change in density, called the ________.
Fill in the blank(s) with the appropriate word(s)
The ________constitute a "super-elite" of extraordinarily wealthy entrepreneurs who bring together the labor, financing, and other components necessary for innovation
A) Star Chamber B) transnational capitalists C) global jet-set D) Leninites
Even though older populations are growing in the wealthier countries, younger workers do not have to worry about higher taxes to provide essential services for the elderly
Indicate whether the statement is true or false.
Field experiments studying the effects of increased CO2 on forest growth have shown ________
A) there is no real effect on net primary productivity B) increased net primary productivity only when phosphorus and iron are abundant C) increased net primary productivity only when nitrogen and water are abundant D) increased net primary productivity under all circumstances E) decreased net primary productivity