Sand and gravel can be separated from each other by ________.
Options:
A .  
Filter funnel
B .  
Sieve
C .  
Evaporating basin
D .  
Decanter
Answer: Option B : B Sieves are used to separate gravel from sand. Sieving is a simple technique for separating particles of different sizes. Depending upon the types of particles to be separated, sieves with different sizes of holes are used.
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