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Air — Social Studies STD 7 — Question

CBSE BoardEnglish MediumSTD 7Social StudiesAir3 Marks
Question
Why do jet planes leaves a white trail behind them?
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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 sometime when there is no air movement to disturb it.
  • These trails of condensed moisture are actually clouds.

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