Term 2 Changes Around Us One Mark Questions with Answer

7th Standard EM

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Science

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 1 = 5
  1. When a woolen yarn is knitted to get a sweater, the change can be classified as _______ .

    (a)

    physical change

    (b)

    chemical change

    (c)

    endothermic change

    (d)

    exothermic change

  2. ___________ of the following are endothermic changes.

    (a)

    Condensation and melting

    (b)

    Condensation and freezing

    (c)

    Evaporation and melting

    (d)

    Evaporation and freezing

  3. The chemical change is ____________ .

    (a)

    water to clouds

    (b)

    growth of a tree

    (c)

    cow dung to bio-gas.

    (d)

    ice-cream to molten ice-cream.

  4. ________is an example of a periodic change.

    (a)

    Earthquake.

    (b)

    Formation of rainbow in sky

    (c)

    Occurrence of tides in seas.

    (d)

    Showering of rain

  5. _________ is not a chemical change.

    (a)

    Dissolution of ammonia in water

    (b)

    Dissolution of carbon-di-oxide in water

    (c)

    Dissolution of oxygen in water

    (d)

    Melting of polar ice caps

  6. 5 x 1 = 5
  7. Filling up a balloon with hot air is a _____ change.

    ()

                   

  8. Stretching gold coin into a ring is a ________ change.

    ()

               

  9. Opening a gas cylinder knob converts _____ fuel into ________ fuel. This is an example of _____ change.

    ()

                

  10. Spoiling of food is a ___________ change.

    ()

                 

  11. Respiration is a _____________ change.

    ()

                      

  12. 5 x 1 = 5
  13. Cutting of cloth is an example of a periodic change.

    (a) True
    (b) False
  14. Taking a glass of water and freezing it by placing it in the freezer is a chemical change.

    (a) True
    (b) False
  15. A bean plant collecting sunlight and turning it into bean seeds is an example of physical and non-periodic change.

    (a) True
    (b) False
  16. If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a periodic change.

    (a) True
    (b) False
  17. Tarnishing of silver is an example of endothermic change.

    (a) True
    (b) False

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