7th Class Science Winds, Storm and Cyclones Question Bank Natural Phenomena: Winds, Storm and Cyclones

  • question_answer
    DIRECTIONS: Read the passage given below and answer the questions that follow. Passage ? 1 Take a boiling tube and stretch a balloon tightly over its neck. Insert the boiling tube in a beaker containing hot water. Wait for 2-3 minutes and observe the changes that take place in shape of the balloon. Now take out the boiling tube and allow it to cool to room temperature. When it has cooled down place it in a beaker containing ice-cold water for 2-3 minutes and observe the changes in shape of the balloon. What changes do you expect when the tube containing the stretched balloon was kept in ice- cold water?

    A) No change is observed

    B) It gets inflated

    C) It gets deflated

    D) None of these

    Correct Answer: C

    Solution :

        It gets deflated


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