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Almost all of Earth's weather takes place in which layer of the atmosphere?
AThe troposphere
BThe stratosphere
CThe ionosphere
DThe ozone layer
Answer & Solution
Correct answer: A. The troposphere
1. The atmosphere is stacked into layers, each with its own behavior.
2. The lowest layer is the troposphere, and it holds most of the air.
3. Warm air rises and cool air sinks there, which builds the clouds and wind we call weather.
_Source: OpenStax Astronomy (CC BY 4.0), section 8.3 Earth’s Atmosphere_
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