Usually, air gets colder as you go higher. In an “inversion,” a layer of warm air sits on top of a layer of cold air. This acts like a lid on a pot, trapping smog, smoke and moisture near the ground. It prevents air from rising and leads to very stable, stagnant weather and poor air quality. ANSWER: (A) Temperature increases with altitude
What occurs during a “Temperature Inversion” in the atmosphere? (A) Temperature increases with altitude (B) Air pressure becomes higher than at sea level (C) Clouds turn into ice crystals (D) The wind stops blowing entirely
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Temperature inversions are the opposite of the “normal” atmospheric state. They often happen on clear, calm nights when the ground cools down very quickly by radiating heat into space. The air touching the ground becomes freezing, while the air higher up stays warmer. Because cold air is heavy, it stays trapped at the bottom. This “stability” means that pollution from cars and factories cannot rise and disperse. This is why cities in valleys often suffer from thick smog during the winter—the inversion “traps” the dirty air right where people breathe.
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