Question

difference between mass and weight.

Answer 1

mass tells us the quantity of matter present in an object
with the help weight we attracted towards the earth with in gravitational force

mass of an object cannot be changed
weight of an object can be changed

Answer 2

Mass of a body is the quantity of matter contained in it. Mass is a scaler quantity which have only magnitude no direction.
Weight of a body is the force with which it is attracted towards the centre of the earth.