On average, this weather phenomenon kills more Americans annually in the than any other
A) hurricanes.
B) tornadoes.
C) severe thunderstorms.
D) air mass weather.
E) floods.
D
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What mineral precipitates at travertine springs to create formations?
A) sulfates B) sulfites C) calcite D) halite
Which area of the U.S. generally has the highest (worst) fire weather potential?
a. the northwest b. the desert southwest c. the southeast d. the northeast e. central plains states
Detached clouds of delicate and fibrous appearance, without shading, usually white in color and sometimes of a silky appearance are
a. ?stratus clouds. b. ?cirrocumulus clouds. c. ?altostratus clouds. d. ?cirrus clouds. e. ?cirrostratus clouds.
Which of the following has been the primary source of oxygen for the Earth's atmosphere in recent geological times?
A. volcanic eruptions B. transpiration C. photodissociation D. photosynthesis