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7th Class Science Sample Paper Science Olympiad Model Test Paper-17

  • question_answer
    Which one of the following statements is incorrect?

    A) When air gets heated, it expands

    B) When air gets cooled, it contracts

    C) The warm air is heavier than cold air

    D) The air moves from high pressure region to low pressure region

    E) None of these

    Correct Answer: C

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