Activity 2.5 NCERT Class 9 Science Chapter 1 Is Matter Around Us Pure
Activity 2.5 asks us to separate cream from the milk by centrifugation.
Centrifugation of the milk separates them into skimmed milk and cream at the top.
Components of a mixture may have different densities. When such a mixture is shaken vigorously, lighter particle separates from the rest and float on the surface. Milk fats are lighter than the rest of the mixture. As a result when we shake milk vigorously milk fat separate and start floating on the surface.
We can separate components of a mixture by centrifugation if the components of the mixture have different densities.
Separation of components from the blood in pathological testing.
Preparation of butter from the milk.