6th Class Science Sample Paper Science Olympiad Model Test Paper-5

  • question_answer
    Water vapor contributes what percent of air by volume?

    A) More than \[3%\]

    B) Between \[1%\] and \[3%\]

    C) Exactly \[21%\]

    D) Less than \[1%\]

    E) None of these

    Correct Answer: D


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