Which statement best explains why glacial deposits have given strong evidence of the existence of Gondwana?
A)A single continent in low latitudes would result in low latitude glaciation.
B)Glacial striations have shown that all glaciers on each continent flowed to a central location.
C)Fossil plants indicate a tropical climate in the northern continents.
D)The existence of a single continent in high latitudes is more sensible than low latitude glaciation on several continents AND glacial striations have shown that all glaciers on each continent flowed from a central location.
E)The existence of a single continent in high latitudes is more sensible than low latitude glaciation on several continents AND fossil plants indicate a tropical climate in the northern continents.
D
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Oxisols are common in:
a. the tropics. b. the middle latitudes. c. the subarctic. d. none of these
Limitations of wind and solar energy include all of the following except
A. both vary in intensity regionally. B. both are very dispersed energy sources. C. both entail a storage problem. D. both are high pollution forms of energy production.
The American Forestry Association suggests that each person plant one tree per year in order to compensate for tree loss in urban areas.
Answer the following statement true (T) or false (F)
Proven reserves of oil are determined by
A) deposits that are possible to mine. B) areas identified as having possible fossil fuels. C) an estimate of oil deposits not yet discovered. D) the total of all oil deposits that have been mined.