what is mass in science

In science, mass is a fundamental property of matter that describes the amount of matter in an object. It is a measure of the bodys inertia, meaning the resistance to acceleration when a net force is applied. The greater the mass of a body, the smaller the change produced by an applied force. The standard unit of mass in the International System of Units (SI) is the kilogram. Mass can be experimentally defined as a measure of the bodys inertia, meaning the resistance to acceleration (change of velocity) when a net force is applied. Mass is not the same as weight, which is the measure of the force of gravity acting on a body. The mass of an object does not change when its location changes, but its weight changes with location.