States of Matter

Any kind of matter can be described as a solid, a liquid, or a gas. These are known as the three states of matter.

solid - has a fixed (unchanging> mass, a fixed volume and a fixed shape.

liquid - has a fixed mass and a fixed volume, but its shape depends on the shape of the container it is in.

gas - has a fixed mass, but its volume and shape depend on the container it is in.