The world reserves of oil and natural gas are found more on the continental margins than in the deep-sea floors
a. True
b. False
True
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Using Figure 9.9 in your textbook, choose the option that sequences the elements according to what scientists think are the least abundant elements in the mantle to the most abundant elements in the mantle
A) Pd, Au, Ge, Mn B) V, P, Mo, Ru C) Cr, Fe, Ag, Os D) As, Pt, W, Ga
The Great Lakes were formed by which of the following physical processes?
A. The gouging and eroding action of continental glaciers. B. fault-block dropping like Lake Baikal in Siberia. C. the erosion of the ancient St. Lawrence River by wind. D. chemical dissolution of the limestone bedrock.
Judge the following sentence according to the criteria given below: Usually a parasite does not rob enough energy to kill the host BECAUSE if the host dies, the parasite can just swim away
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Which of these numbered features contains most of Earth's freshwater?
A. 1-ocean B. 2-atmosphere C. 3-glaciers and ice sheets D. 4-groundwater E. 5-lakes