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 change do you expect when the tube containing the stretched balloon was kept in a beaker containing hot water?

    A) There will be no change in the shape of the balloon

    B) Balloon gets inflated

    C) Balloon gets deflated

    D) Shape of balloon becomes distorted

    Correct Answer: B

    Solution :

        It gets inflated.


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