Why does hot water come out of hydrothermal vents on the flanks of the mid-ocean ridges?
a) Water is released from the mid-ocean ridge magma and oozes out of the crust
b) Flows of hot lava on the sea floor cause seawater to be heated
c) Sea water percolates downward through cracks in the crust, is heated in the hot deeper crust, and rises back up to the surface through other cracks
d) Chemical reactions result in dehydration of the crust when freshwater is in contact with fresh basalt near the mid-ocean ridge
e) Seawater percolates downward in the crust through cracks and flashes to steam on contact with hot lava deep in the crust
C
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John Rawls suggests that there are circumstances in which inequality is just or what he terms “fair.” What is Rawls’ argument for this?
a) Inequality is fair, as long as it is for everyone’s advantage (for example, the authority of parents over their children). b) Inequality is fair when certain people agree to take the brunt of the environmental bad on behalf of the good. c) Inequality is fair when leadership has been democratically elected. d) All of the above.
Explain the motives for establishing marine reserves and marine protected areas. Describe the difference between the two
What will be an ideal response?
The predominate system of agriculture practiced in Subsaharan Africa is
A) subsistence cultivation. B) intensive subsistence wet rice dominant. C) mixed crop and livestock. D) pastoral nomadism. E) dairy.
Limestone caverns are closely associated with ________
A) granite bedrock B) hot springs and geysers C) bedding and jointing planes D) bicarbonate acting as an acid to dissolve rocks E) dissolution of minerals as they enter the caverns