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Air — Social Studies STD 7 — Question

CBSE BoardEnglish MediumSTD 7Social StudiesAir2 Marks
Question
We see a white trail behind jet planes flying in the sky. Explain the reasons for same.
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Answer

Jet planes flying in the sky leave a white trail behind them. The moisture from their engines condenses. We see trails of this condensed moisture for some time when there is no air movement to disturb it.

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