Which of the following statements is FALSE? A cumulonimbus cloud: may be topped
ID: 293471 • Letter: W
Question
Which of the following statements is FALSE? A cumulonimbus cloud:
may be topped by an anvil cloud.
may extend to the top of the troposphere.
produces rain.
is filled with updrafts, not downdrafts of air.
Which of the following statements is FALSE? Atmospheric circulation zones include:
an intertropical convergence zone that produces an equatorial low.
a subtropical high at 30° latitude, which has downward-moving, diverging air.
a Hadley cell-Ferrel cell convergence at 60° latitude, which produces a zone of rising air called the subpolar high.
an equatorial low that creates regions of heavy rainfall and tropical rainforests.
Which of the following statements is FALSE? Atmospheric oxygen:
is necessary for the respiration of multicellular organisms.
is supplied mainly by chemical breakdown of carbonate rocks like limestone.
was originally introduced by the photosynthesis of blue-green algae (cyanobacteria).
reached a peak of about 35% during the late Paleozoic (coal age).
a.may be topped by an anvil cloud.
b.may extend to the top of the troposphere.
c.produces rain.
d.is filled with updrafts, not downdrafts of air.
Explanation / Answer
1. The statement which is false about the cumulonimbus clouds is option (d) is filled with updrafts and not downdrafts of air. This is false because the cumulonimbus clouds generally are meant to bring rain and thunderstorms and hence they should be highly rich in downdrafts of air.
2. The statement which is false about the atmospheric circulation is option (c)a Hadley cell-Ferrel cell convergence at 60° latitude, which produces a zone of rising air called the subpolar high.
3. The statement which is considered to be false out of the options given is (d) reached a peak of about 35% during the paleozoic. This is false because the paleozoic era is marked by sudden reduction in level of oxygen due to the development of a carbon dioxide and reducing environment specially during the carboniferous times.
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