Air Book Back Questions

6th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 00:45:00 Hrs
Total Marks : 30
    3 x 1 = 3
  1. Gas exchange takes place in plants using __________

    (a)

    Stomata

    (b)

    Chlorophyll

    (c)

    Leaves

    (d)

    Flowers

  2. The constituent of air that supports combustion is _________________

    (a)

    Nitrogen

    (b)

    carbon-di-oxide

    (c)

    Oxygen

    (d)

    water vapour

  3. Nitrogen is used in the food packaging industry because it ________________

    (a)

    provides colour to the food

    (b)

    provides oxygen to the food

    (c)

    adds proteins and minerals to the food

    (d)

    keeps the food fresh

  4. 3 x 1 = 3
  5. __________ is the active component of air.

    ()

    Oxygen

  6. __________ gas is given to the patients having breathing problems.

    ()

    Oxygen

  7. ________ gas turns lime water milky.  

    ()

    Carbon-di-oxide

  8. 2 x 1 = 2
  9. Inhaled air contains a large amount of carbon-di-oxide.

    (a) True
    (b) False
  10. The composition of air is always exactly the same.

    (a) True
    (b) False
  11. 3 x 2 = 6

  12. What will happen if we remove plants from the aquarium?

  13. What should be done if the clothes of a person catch fire accidentally? Why?

  14. What will happen if you breathe through mouth?

  15. 2 x 3 = 6
  16. Biscuits kept open on a plate during monsoon days lose its’ crispness. Why?

  17. Why do traffic assistants wear a mask on duty?

  18. 2 x 5 = 10
  19. How do plants and animals maintain the balance of oxygen and carbon-dioxide in air?

  20. Can you guess why fire extinguishers throw a stream of carbon-di-oxide while putting - off fire?

*****************************************

Reviews & Comments about 6th Science - Air Book Back Questions

Write your Comment