Jessica saw her mother rotating a milk churner in a container of milk. She was surprised and asked her mother why she was doing that. Her mother smiled and explained that she was separating cream from milk,which would be used in various dishes.
$(a)$ What kind of qualities are shown by Jessica's mother?
$(b)$ How is cream easily separated from milk by a milk churner?

(N/A) The qualities shown by Jessica's mother are:
$(i)$ In-depth knowledge of household tasks.
$(ii)$ Caring nature towards her family.
$(iii)$ Awareness of her duties and responsibilities.
$(b)$ When milk is rotated at a high speed using a churner,the principle of centrifugation is applied. The denser components of milk are pushed towards the sides of the container,while the lighter particles (cream) collect in the center. Since cream is lighter than the skimmed milk,it floats on the surface and can be easily separated.