Winnowing is the method used for separating a mixture of husk from grains. It is based on the principle that the lighter husk particles are carried away by the wind leaving behind the grains.
Question
Name and describe briefly a method which can be helpful in separating a mixture of husk from grains. What is the principle of this method?
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Read the story titled “WISE FARMER” and tick the correct option to complete the story. A farmer was i. sad/happy to see his healthy wheat crop ready for harvest. He harvested the crops and left it under the ii. Sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk he iii. handpicked/threshed them. After gathering the seed grains, he wanted to separate the stones and husk from it. His wife iv. winnowed/threshed them to separate the husk and later v. sieved/handpicked to remove stones from it. She ground the wheat grains and vi. sieved/filtered the flour. The wise farmer and his wife got a good price for the flour.
Open Answer »Both Sarika and Mohan were asked to make salt solution. Sarika was given a teaspoonful of salt and half a glass of water, whereas Mohan was given twenty teaspoonful of salt and half a glass of water. (i) How would they make salt solutions? (ii) Who would be able to prepare saturated solution?
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