7th Class Social Science Sample Paper Social Science Sample Paper - 3

  • question_answer
    Explain the circulation of air in the atmosphere.     

    Answer:

           
    Process of circulation of air:
    (i) When air is heated it expands, becomes light and rises up.
    (ii) Cold air is dense so, it sinks down.
    (iii) When hot air rises up, cold air from surrounding areas fill in the gap.  


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