Term -2 Class:7 Science 3. Changes Around Us - Choose - clickhere

clickhere

Term -2 Class:7 Science 3. Changes Around Us

வினாக்களை படித்து , புரிந்துகொண்டு விடைகளை தேர்ந்தெடுக்கவும்:
Understand the Question and choose the Correct answers:
Prepared & Supported by www.thodakkakalvi.com TEAM

  

5 நிமிடத்திற்குள் கவனமாகவும் , விரைவாகவும் விளையாட்டை முடிக்க.
விளையாடி முடித்தபின் , அனைத்தையும் எழுதிப்பார்க்கவும். நன்றி.
உங்கள் முயற்சிக்கு வாழ்த்துகள்.

 

1. Which of the following is a physical change?
   1.   Crushing a can
   2.   Rotting Egg
   3.   Digestion of Food
   4.   Rusting of Iron
2. The transition from solid to liquid is called ______________.
   1.   Melting
   2.   Freezing
   3.   Vaporization
   4.   Sublimation
3. Condensation is a change of state from ______________.
   1.   Gas to liquid
   2.   Liquid to solid
   3.   Liquid to gas
   4.   Solid to gas
4. Which of the following is a exothermic process?
   1.   Freezing
   2.   Melting
   3.   Sublimation
   4.   Vaporization
5. Boiling is a _________________ change.
   1.   Physical
   2.   Chemical
   3.   Undesirable change
   4.   Irreversible change
6. __________ is the technique used to separate dissolved solids from a solid-liquid mixture.
   1.   Evaporation
   2.   Boiling
   3.   Condensation
   4.   Melting
7. The formation of clouds is an example for ________________.
   1.   Condensation
   2.   Freezing
   3.   Vaporization
   4.   Sublimation
8. Which of the following is an example of sublimation
   1.   Camphor
   2.   Candle
   3.   Water
   4.   Ice cubes
9. The solube impurities get removed from certain solids by ________________.
   1.   Crystallization
   2.   Evaporation
   3.   Sublimation
   4.   Condensation
10. Which of the following is not a chemical change?
    1.   Chopping Vegetables
    2.   Burning
    3.   Curdling of milk
    4.   Fermentation