question_answer 8)

What is winnowing? Where is it used?

Answer:

 Winnowing is used to separate heavier and lighter components of a mixture by wind or by blowing air. e.g. Wheat grains and husk are different in weight, husk being lighter than wheat. When this mixture is allowed to fall down from a height, the wind carries the lighter husk with it and the heavy grains fall vertically down on the ground. This process is used by farmers to separate lighter husk particles from grain.