7th Class Science Sample Paper Science Sample Paper - 1

  • question_answer
    Explain how lightning takes place.

    Answer:

    During the condensation of water vapour and freezing of droplets, a large amount of heat is released which further pushes the air up at a high speed. The water droplets and ice particles rub against each other in rapidly rising air. This builds up an electric charge which is released by a stroke of lightning.


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