Wars in the Middle East region in the past two decades have been associated with increased
A) efforts to stop global terrorism wherever it exists in the world.
B) demand for natural gas.
C) U.S. interests in Middle East oil.
D) interest in resolving the Palestinian Israeli border disputes.
C
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Compared to the amount of electric current in the filament of a lamp, the amount of current in the connecting wire is
A. often less. B. definitely less. C. the same. D. actually more.
A naturally occurring solid chemical element with a distinct composition and a crystal structure is a(n) ________
A) rock B) horizon C) sediment D) organic nutrient E) mineral
Each population in an ecosystem has a ____ to variations in its physical and chemical environment.
A. low tolerance B. high tolerance C. range of tolerance D. high resilience E. low resilience
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