separation of substances (seivings)

Give examples for impurities that can be removed by seiving.

How can the impurities that are leftover after threshing and winnowing be removed?

• by handpicking

• by threshing

• by seiving

fill in the blanks :-

In a flour mill impurities like ____ and ______ are remains from wheat before grinding it.

Seiving allows ______ particles to pass through the holes of the shiv while ___________ remain on the seed.

Seiving is used when components of a mixture have same size.

• True

• False