Separation of Substances — Science STD 6 — Question
Gujarat BoardEnglish MediumSTD 6ScienceSeparation of Substances2 Marks
Question
What is sieving? Where Is it used?
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Answer
Sieving: When components of a mixture have different sizes. The small holes in the sieve allow fine particles to pass through and the larger ones remain above the sieve. This method is called sieving. Uses:
$(1)$ In flour mills, impurities like husk and stones are removed from wheat before grinding it. Wheat is sifted through a sieve to remove pieces of stones, stalk and husk that may remain after threshing and winnowing.
$(2)$ Sieving is used at construction sites to separate pebbles and stones from sand.
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