Anything that takes up space that has mass.

How much matter is in an object.

Tells you something about an object

A state of matter that does not have a shape of its own.  It takes the shape of its container.

A state of matter that takes up space, spreads out, and fills its container.

The amount of space that something takes up

A state of matter that takes up space and has mass.  It has a shape of its own.