2. Questions Bank
  3. 3rd Class
  4. Science
  5. Our Body

3rd Class Science Our Body Question Bank Human Body

  • question_answer
    Beena, Shalu and Navpreet wanted to find out who among them had the biggest lung capacity. They decided to blow into a balloon with one breath and see how big it will become. Which of the following factors they must keep the same to make the test a fair one?
    1. Colour and design pattern of the balloon
    2. Size and shape of the balloon
    3. When to breathe in forcibly before blowing
    4. Material, balloon is made of
     

    A) 1 and 2 only   

    B) 2 and 3 only   

    C) 1, 3 and 4 only           

    D) 2, 3 and 4 only

    Correct Answer: D

    Solution :

    Final size of the balloon after blowing air will depend on initial size, shape and material of the balloon, thus these should be kept same. Colour and design pattern have no effect on it. Breathing in forcibly before blowing will increase the amount of air blowed out hence all of them should breathe in before blowing.


You need to login to perform this action.
You will be redirected in 3 sec spinner