No volume is how much space an object takes up. Mass is the measure of the amount of matter in an object.
the mass of an object measures the amount of matter in a object.
Volume.
Are you looking for mass??
It is a measure of the amount of matter in an object.
mass
I expect that the answer that you are required to give is the mass. However, the mass of any radioactive object is very definitely not an unchanging measure. And even with non-radioactive materials, some Grand Unified Theories (GUTs) of matter suggests that protons themselves might decay with a half life of over ten decillion years! While that is hugely greater than the 14.5 years that the universe has been in existence, it is not unchanging - if true.
Mass
amount of matter making up an object(the answer is Mass)mass
It is the mass of the object.
The amount of matter in an object or body.Actually the amount of space an object takes up.
The measurement of the amount of matter in an object is its mass. Mass is typically expressed in units such as kilograms or grams and represents the quantity of material in an object, irrespective of its volume or weight.
Mass is a measurement of the amount of matter in an object. It is commonly measured in units such as kilograms or grams.
Weight is not considered a constant measurement of the amount of matter in an object because weight depends on the gravitational force acting on the object, which can vary based on location. The amount of matter in an object is determined by its mass, which remains constant regardless of location or gravitational pull.
The amount of matter that makes up an object is defined by its mass. Mass is a measurement of the amount of substance in an object and is typically measured in grams or kilograms.
The unchanging property of matter is mass. Mass is a measure of the amount of matter in an object and remains constant regardless of changes in its shape or state.
Mass is a measure of the amount of matter in an object. It is a fundamental property of an object that remains constant regardless of its location in the universe. The unit of measurement for mass is the kilogram.