Practice:Matter

Matter and its properties
Matter exists in three states: Solid,liquid and gaseous.

Plasma is considered to be the fourth state of matter. In the case of solids molecules are closely packed and inter molecular distances are less.

When heat is supplied to solids energy of the molecules increases which increases the inter molecular distance.

When a solid is heated, it melts and changes into a liquid. If heated further it turns into the gaseous state.

== Melting and boiling points ==