Immigration to the United States slowed considerably after the First World War and remained low until the ________.
A. 1970s
B. 1980s
C. 1960s
D. 1990s
Answer: C
Environmental & Atmospheric Sciences
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If the mass of Phil Physiker doubles, his weight
A. also doubles. B. remains the same. C. is quadrupled. D. would be less.
Environmental & Atmospheric Sciences
Coal occurs in sedimentary successions, and therefore it can only be mined underground.
a. true b. false
Environmental & Atmospheric Sciences
Our most recent understanding of the formation of tropospheric ozone requires the reduction of atmospheric levels of
A) volatile inorganic compounds. B) carbon monoxide and volatile organic compounds. C) nitrogen oxides and carbon monoxide. D) nitrogen oxides and volatile organic compounds.
Environmental & Atmospheric Sciences
Which of the following is an example of a verbal scale?
a. 1:10, 000 b. 1 inch to 10 miles c. d. none of these
Environmental & Atmospheric Sciences