Which of the following was not a consequence of the early heating of the earth?
A. formation of an atmosphere
B. release of abundant, free oxygen into the atmosphere
C. internal differentiation, forming a core, mantle and crust
D. formation of the oceans
Answer: B
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The portion of each meandering curve subject to the fastest water velocity undergoes the greatest erosive action. This action forms a steep
A) uppercut bank. B) cutback. C) meander scar. D) point bar. E) oxbow.
Glacially derived wind deposited soil is called
A. loam. B. pedofers. C. loess. D. pedocals.
If the half-life of carbon-14 is about 5,700 years, then of a given starting quantity, after 22,800 years (four half-lives), what fraction of the original amount will be left?
A. none B. 1/8 C. 1/4 D. 1/16
Although it has been largely phased out in most countries, the World Health Organization (WHO) supports the limited use of ____________________ to control the spread of malaria
Fill in the blanks with correct word