Overall, the most prevalent greenhouse gas in the atmosphere is ____.
a. methane (CH4)
b. nitrous oxide (N2O)
c. chlorofluorocarbon (CFC)
d. carbon dioxide (CO2)
e. sulfur dioxide (SO2)
Q. 2Presently, the annual average of CO2 is about 400 ppm, and the concentration is increasing by about ____ ppm per year.
a. 2
b. 5
c. 8
d. 12
e. 15
Q. 3Everything else being equal, the more CO2 in the atmosphere, the ____.
a. cooler the surface air
b. warmer the surface air
c. more cloud cover of Earth
d. greater the amount of precipitation
e. the more likely ice will form in polar regions
Q. 4If the number of sulfate aerosols inside a cloud should increase, the cloud would have to share its available moisture with the added nuclei, and ____ cloud droplets would be produced.
a. the same number, but larger
b. fewer, but larger
c. more, but larger
d. fewer, but smaller
e. more, but smaller
Q. 5Particles that reduce the amount of sunlight reaching Earths surface tend to cause ____ of the surface air during the ____.
a. a net cooling; day
b. a net warming; night
c. less precipitation; day
d. less precipitation; night
e. greater humidity; day
Q. 6An infamous cold spell often linked to volcanic activity occurred during the year ____, which has come to be known as the year without a summer.
a. 1492
b. 1550
c. 1685
d. 1816
e. 1964
Q. 7____ may be the most important weather element in terms of the impact on humans.
a. Volcanoes
b. Temperature
c. Precipitation
d. Tornadoes
e. Clouds
Q. 8Volcanoes that have the most impact on global climate seem to be those rich in ____.
a. nitrogen
b. water vapor
c. carbon dioxide
d. sulfur
e. oxygen
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