Weight is the measure of gravity on an object measured by a weight in Newtons. Weight changes if gravitational force changes. Mass is the amount of kilogram in an object measured by a in grams and does not change…it stays the .

Mass is an intrinsic property of matter and is measured in kilograms. The mass of a bird is a constant. A 15-gram bird is 15 grams, whether measured on the Earth, the Moon, or Mars. Weight is a measure ofthe force of gravity on a physical object and is measured in newtons.

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