Phases and Classification of Matter| Essential Ideas| Chemistry| Openstax| Problem 8

Why do we use an object’s mass, rather than its weight, to indicate the amount of matter it contains?


An object’s mass is used because the mass of the object is independent of outside forces on the object (that is, it is an intrinsic property of the object), whereas weight depends on the force of gravity and varies as gravity changes from location to location.



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