33
Question
Identify the correct order of methods a farmer would use to separate the grain from rest of the crop.
Identify the correct order of methods a farmer would use to separate the grain from rest of the crop.
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Solution
The correct option is C Threshing, Winnowing, Sieving
1. A farmer has to first remove the grains from the stalk, so he used threshing. Hence, the first step to obtain grain is threshing. The problem is after this step there is still husk with the grain.
2. Husk is lighter than the grain, therefore, the farmer can use winnowing to separate the husk from the grain. The grain will directly fall down and collect in a separate heap.
3. The last step is to separate the stones that might have mixed with the grain. The stones cannot be separated by winnowing as they might be of the same weight as the grains. Hence, based on their difference in size from the grain, we use sieving.
Hence, the correct order of the methods to remove grain from rest of the crop is threshing, winnowing and sieving.
1. A farmer has to first remove the grains from the stalk, so he used threshing. Hence, the first step to obtain grain is threshing. The problem is after this step there is still husk with the grain.
2. Husk is lighter than the grain, therefore, the farmer can use winnowing to separate the husk from the grain. The grain will directly fall down and collect in a separate heap.
3. The last step is to separate the stones that might have mixed with the grain. The stones cannot be separated by winnowing as they might be of the same weight as the grains. Hence, based on their difference in size from the grain, we use sieving.
Hence, the correct order of the methods to remove grain from rest of the crop is threshing, winnowing and sieving.
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