Average global temperatures from thousands of years ago can be determined by measuring which of the following from a glacial ice core?
A) The half-life of radioactive water.
B) The size of ice crystals.
C) The ratio of deuterium to hydrogen.
D) The percentage of atmospheric nitrogen.
Correct Answer:
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Q103: What is the brown-colored component of smog?
A)H2SO4
B)O2
C)NO2
D)O3
E)c
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A)O3
B)O2
C)NO2
D)H2SO4
E)c
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