Question

1.Name the technique: how can we separate cream from milk?
2.What is the difference between metal and non-metal?

Answer 1

Cream and milk differ in densities. The technique used here is based upon the principle of sedimentation. Substances separate according to their densities. Metal and no-metals are elements that differ from each other in a wide range of areas.

Complete answer: 1.Milk is composed mostly of water and fats and also calcium and protein. It is a colloidal solution cream is oil in water emulsion. This means that the quantity of water is more than the quantity of oil. It's just the milk fat clumping together. Milk is much thinner than cream.
The technique that is used to separate cream from milk is called centrifugation. Both cream and milk differ in densities. During the process of centrifugation, milk is rotated at a very high speed in a centrifuge. After the process, the one which is lighter floats on the surface and the heavier ones settle at the bottom. In the case of cream and milk, the cream is lighter so it floats on top and the milk is heavier so it settles at the bottom.

2.Metals and non-metals difference

Metals	Non-metals
Metals are malleable, ductile. Also, they are shiny.	Non-metals are not malleable and non-ductile. These are dull in appearance.
These are good conductors of heat and electricity.	These are bad conductors of heat and electricity.
They have high density.	They have low density.
They can be bent and stretched. They are hard and strong.	They are brittle, break easily when bent and stretched. They are weak and soft.
These are solid at room temperature.	These are present in all three solids, liquids, and gases.

Note:
The centrifugation process works on the principle of sedimentation, where the centrifugal acceleration causes the denser substance and particles to move outward in the radial direction.
There are many more differences between a metal and a nonmetal. they differ in nature, state, function, conductance, appearance etc.