7th Class Science Heat Question Bank Heat

  • question_answer
    Windows having double glass panes with some space between them is called double glazing. Why do windows in cold countries have double glazing?

    A)  For the conduction of heat

    B)  For the insulation of heat

    C)  For the radiation of heat

    D)  All of the above

    Correct Answer: B

    Solution :

    In cold countries, windows have double glass panes with a small space between them. This space contains air which is a bad conductor of heat and prevents the dissipation of heat away from the room. This is called double glazing.


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