The most abundant gas in the stratosphere is
a. ?oxygen (O2).
b. ?nitrogen (N2).
c. ?carbon dioxide (CO2).
d. ?ozone (O3).
e. ?chlorofluorocarbons (CFCs).
ANSWER: b
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A block of ice sliding down an incline has its maximum potential energy at
A. half-way down. B. the top. C. a quarter of the way down. D. the bottom.
Which of the following clouds is most likely to produce drizzle?
A. cirrostratus B. cumulus C. cumulus congestus D. stratus
The only substance that can exist as a gas, liquid, and solid at common Earth temperatures is
A) carbon. B) nitrogen. C) water. D) oxygen.
Which statement about deserts is most accurate?
A)Evaporation exceeds precipitation in arid and semi-arid regions. B)Loess deposits are common in deserts. C)The geologic process at work in deserts are vastly different from those at work in humid regions. D)Deserts do not have seasons, and they are uniformly hot year-round. E)Deserts occur where atmospheric pressure is low.