How warm something is has most to do with molecular
A. kinetic energy.
B. stickiness.
C. masses.
D. potential energy.
Answer: A
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Which structural feature is common to aldehydes and ketones
A) an oxygen atom bonded to both a carbon atom and a hydrogen atom B) an oxygen atom bonded to two carbon atoms C) an oxygen atom double bonded to a carbon atom D) two oxygen atoms bonded to the same carbon atom
Which of the following geologic observations would not bear directly on working out the sequence of geologic events in an area?
A) inclusions of sandstone in a granite pluton B) the feldspar and quartz contents of a granite C) an unconformity between a granite and sandstone D) a well-exposed dike of basalt in sandstone
The West African country of Togo and the European country of France have approximately the same arithmetic density. From this we can conclude that the two countries have the same
A) level of output per farmer. B) number of people per area of land. C) pressure placed by people on the land to produce food. D) standard of living.
The population of the African region is approximately
a. 500 million. b. 850 million. c. 700 million. d. just over 1 billion. e. almost 2 billion.