Stratosphere
/strˈætəˌsfɪr/
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Definition
(noun) The region of the uppermost atmosphere where the temperature increases along with the altitude due to the absorption of solar ultraviolet radiation by ozone.
Sentence Examples
Ozone in the stratosphere absorbs some of the sun’s harmful ultraviolet radiation.
The ozone in the stratosphere absorbs ultraviolet radiation.
CEFR Practice Quiz
The weather balloon traveled high into the ____ to gather data about the air quality and temperature.