Question
Rashi found wheat grains mixed with powdered dry leaves. How can she separate the two of them easily? Explain the whole mechanism in detail. [5 MARKS]
Answer:
:
Explanation: 1 Mark each
1. She can separate the two easily by using the method of winnowing.
2. The method of winnowing is based on the principle that the lighterparticles will be blown away when air is blown through the mixture.
3. The mixture is taken to an open ground and is held while standing on a raised platform. The mixture is put on a plate or a sheet of paper. The plate or sheet of paper containing the mixture is held at shoulder level. It's slightly tilted downward so that the mixture slowly starts sliding out.
4.The plate is moved upwards and downwards in the air so that the mixture falls to the ground.
5. The driedleaves will scatterout because they are lighter and are carried away by the wind. The wheat forms a separate heap on the ground. Hence the two components are separated.
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:
Explanation: 1 Mark each
1. She can separate the two easily by using the method of winnowing.
2. The method of winnowing is based on the principle that the lighterparticles will be blown away when air is blown through the mixture.
3. The mixture is taken to an open ground and is held while standing on a raised platform. The mixture is put on a plate or a sheet of paper. The plate or sheet of paper containing the mixture is held at shoulder level. It's slightly tilted downward so that the mixture slowly starts sliding out.
4.The plate is moved upwards and downwards in the air so that the mixture falls to the ground.
5. The driedleaves will scatterout because they are lighter and are carried away by the wind. The wheat forms a separate heap on the ground. Hence the two components are separated.
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