Making rough estimate of physical quantities is useful because it allow us to have an idea of how big or small a quantity is, it gives us the near result of the real quantity a matter contains. The approximate quantity obtained will give us information about the size of the quantity.
C. The liquid in Beaker A is not as dense as the liquid in Beaker B.
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Hey there,
The answer is Hydrosphere.
Hope this helps :))
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