What do we call the quantity of matter that an object contains?

A. mass

B. weight

C. volume

D. density

A. the mass is the quantity of matter that an object contains

The quantity or the amount of matter inside the object is called the mass. Mass is one of the seven fundamental units and is usually measured through different balances. In S. I units, the most common way of expressing the mass is in kilograms and pounds in the English system.