SOLIDS:
In solids, the molecules are closely packed, when heated at melting point, it changes its physical state and becomes a liquid. For an instance, When a solid substance is heated, the heat energy make its molecules vibrate more vigorously. At the melting point, the molecules of a solid have sufficient kinetic energy to overcome the strong forces of attraction holding them in fixed positions and break to form small groups of molecules.Hence the solid melts to form a liquid.
1)A solid has fixed shape
2) A solid has fixed size
3) A solid can not be compressed
4) A solid does not fill its container completely.
5) A solid does not flow.
Examples: Wood,Stone,Sand,Iron,Ice etc