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=METHODS OF SEPARATION=

Threshing
The process that is used to separate grain from stalks is threshing.

Winnowing
The method of separating components of a mixture is called winnowing.

Sieving
Sieving allows the fine particles to pass through the holes of the sieve while the bigger impurities remain on the sieve.

Sedimentation
When the heavier component in a mixture settles after water is added to it, the process is called sedimentation.