T2 - Changes Around Us English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

7th Standard

    Reg.No. :
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Science

Time : 00:05:00 Hrs
Total Marks : 5

    Part A

    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

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