38. Give one use of each the method of winnowing and handpicking.

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Solution

A method of separation to take out unuseful material by hand is known as handpicking.
Hand-picking is used for separating undesired material like small stones from wheat, pulses, and rice.
Winnowing is the process of using wind or blowing air to separate heavier and lighter components of a mixture.
Farmers employ this winnowing procedure to remove lighter husk particles from heavier grain seeds.

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Differentiate between

b. Handpicking and winnowing

If the components can be differentiated by size and shape, then the mixture can be separated by ___________ (winnowing/handpicking).

(i) When can we use handpicking method of separation?

(ii) Explain the process of Threshing.

The principle behind using winnowing as a method of separation is based on the difference in _________ of the particles.

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