In terms of the number of premature deaths per year, the greatest risk people in the U.S. face today is
A. toxic chemicals.
B. poverty.
C. AIDS.
D. driving.
E. smoking.
Answer: B
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How many electrons are gained or lost in the following half-reaction? 2 Na ? ? 2 Na+
A. 2 electrons are lost B. 1/2 electron is gained C. 1/2 electron is lost D. 2 electrons are gained E. 4 electrons are gained
What two activities use the most water for a typical North American family of four?
A. dishes and drinking B. lawns and toilets C. bathing and cooking D. laundry and car washing
The prevailing sea-to-land and land-to-sea winds that are the dominant climatic concern for people living in the Asian region are
a. monsoons. b. typhoon. c. tsunamis. d. cyclonic or frontal lifting. e. orographic lifting.
Ripple like clouds in the sky are an example of ________ waves
A) atmospheric B) internal C) splash D) tidal E) turbidity