Because that is the definition of mass.
The amount of matter in an object is mass.
No, weight is how much gravity is pulling down on an object. Mass is the amount of matter in an object.
The amount of matter in an object is called mass.
By using mass. (In physics, mass (from Greek μᾶζα "barley cake, lump (of dough)"), more specifically inertial mass, is a quantitative measure of an object's resistance to acceleration.) Essentially mass is the measure of the amount of matter in an object. So to explain the amount of matter in an object one would have to find the mass of an object. Mass is normally measured in grams. To measure the mass of an object on would have to weigh it with an accurate balance. Now, you might ask yourself if mass and weight are the same thing. In the vernacular it is, but to physicists it refers to the amount of gravitational force exerted upon an object.Sources:WikipediaMy memory
Mass is the amount of matter in an object. Weight is the force of gravity on an object.
Mass refers to the amount of mass in an object.
called mass- mass: amount of matter an object obtains
the mass of an object measures the amount of matter in a object.
The mass describes the amount of an object. :)
The amount [of stuff] in an object or substance is its mass.
mass of an object is the amount of matter in an object
An object's mass is a measure of the amount of matter in the object compared to known masses. Mass is the measure of the amount of matter in an object.