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TAKE THE QUIZtroposphere
noun
tro·po·sphere
ˈtrō-pə-ˌsfir
ˈträ-
: the lowest densest part of the earth's atmosphere in which most weather changes occur and temperature generally decreases rapidly with altitude and which extends from the earth's surface to the bottom of the stratosphere at about 7 miles (11 kilometers) high
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Merriam-Webster unabridged
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- Often used to describe “the march of time,” what does inexorable mean?


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