Distinguish between mass and weight.

Explanation

The mass of a body is denfined as the quantity of matter constained in the body. If does not change with height, depth and rotation of earth. The mass of a body is a scale quantity and is measured in kilogram or gram. The mass of a body is never zero anywhere.
The weight of a body is denfined as the force of attraction on the body exerted by Earth towards its centre. If `m` is the mass of the body placed on the surface of Earth, where the acceleration due to gravity is `g`, then weight of the body `= mg`. The weight of the body changes with height, depth and roation of Earth. The weight of a body is a vector quantity and is mesured in newton or dyen or kg wt. or gwt. The weight of a body is zero at the centre of Earth or in a lift falling down with an acceleration, equal to the acceleration due to gravity.