The best evidence that the Sun is a newcomer in the universe is
A) the existence of heavy elements in its composition.
B) its relatively slow rate of spin.
C) its high temperature as revealed by its color.
D) its position in the galaxy.
E) its very existence in spite of its high burning rate.
A
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Why did Aung San Suu Kyi win the Nobel Peace Prize?
A) indigenous social movement in Thailand B) democratic reform in Cambodia C) democratic reform in Burma D) political reform in Indonesia E) none of the above
The demographic transition is a model of population change used to explain high population growth rates. According to the theory,
A) birth rates decline, eventually followed by a decline in death rates. B) death rates decline, eventually followed by a decline in birth rates. C) birth rates and death rates decline simultaneously. D) birth rates rise, eventually followed by a rise in death rates. E) death rates rise, eventually followed by a rise in birth rates.
Satellites measure rainfall from space using which of the following instruments?
A. ceilometer B. calibrated rain gauge C. tipping-bucket rain gauge D. radar
Which of the following is an example of a secondary alcohol?
A) CH3OH B) CH3CH2OH C) CH3CH2CH2OH D) none of these