Pronunciation: /ˈtrɒpəˌsfɪər/
noun the lowest region of the Earth's atmosphere, where most weather phenomena occur
A1 The troposphere is the lowest layer of Earth's atmosphere.
A2 Weather events such as rain and storms occur in the troposphere.
B1 The troposphere contains approximately 75% of the atmosphere's mass.
B2 Commercial airplanes typically fly in the lower part of the troposphere.
C1 The troposphere plays a crucial role in regulating Earth's climate and temperature.
C2 Scientists study the troposphere to better understand atmospheric dynamics and climate change.
formal The troposphere is the lowest layer of Earth's atmosphere, where most weather phenomena occur.
informal Planes fly in the troposphere because it's the layer closest to the ground.
slang I heard it's pretty turbulent in the troposphere today, so hold on tight!
figurative In the troposphere of social media, trends come and go quickly.
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