Question

Define 1. winnowing
2. Sieving
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Answer 1

Answer:

Winnowing is a process of separation in which the lighter substance blows away by the wind and the heavier substance remain there . Example husk from grain

Sieving is a process of separation in which the substance gets evaporated.

Answer 2

Answer:

• Winnowing

Blow a current of air through (grain) in order to remove the chaff.

• Sieving

Sieving is a simple technique for separating particles of different sizes. A sieve such as used for sifting flour has very small holes.