What Is the Amount of Matter in an Object Called?

A thing’s mass is the amount of matter it contains. Even though an object’s mass is one of the things that determines its weight, it is not the same thing. Gravity affects an object’s weight, which can change depending on where it is in relation to another object that is pulling on it. However, an object’s mass stays the same even when there is no gravity acting on it, like when it is in space outside of the Earth’s gravitational field.

The density of an object is measured by how much of its mass fits into the space it takes up, which is called its volume. The density of an object is not the same as its mass, just like weight is not the same as mass. A thing’s density is the same as its mass divided by its size. The mass of an object is measured in grammes or kilogrammes, but its density is given as a ratio of grammes to volume, such as grammes per cubic centimetre, or g/cm3.

When a force is put on an object, how fast it moves in response to that force depends on how much mass the object has. When an object has more mass, it has more inertia. The amount that an object will resist a force acting on it or stay in motion once it is moving has to do with its inertia, which is also affected by how much mass the object has.


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