Class VI

The process of settling down of particles of a solid in a liquid is known as
  1. Sublimation
  2. Sedimentation
  3. Ddecantation
  4. Precipitation
The process of conversion of water vapour into its liquid form is called 
  1. Division 
  2. Evaporation 
  3. Condensation 
  4. Separation 
In evaporation, water changes into 
  1. Vapour 
  2. Ice 
  3. Oxygen 
  4. Air 
Salt is obtained from sea water by using which of the following process
  1. Sedimentation
  2. Condensation
  3. Evaporation
  4. Centrifugation
Which of the following is essential to perform winnowing activity?
  1. Soil
  2. Water
  3. Wind
  4. None of these
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