The kinetic molecular model uses this idea that all materials are made up of atoms that behave rather like tiny balls.
Kinetic Theory Of Solids:
In solids the molecules are attached just as if springs representing the electric forces between molecules,hold the molecules together (as shown in figure)this enables the solid to keep a definite shape and volume. Kinetic Theory Of Liquids:
A model to represent the liquid state can be made by covering about a third of the fitted tray with marbles that represents the molecules (as shown in figure)it is shaken to and from and the motion of the marbles observed.They are able to move around but most stay in the lower half of the tray,so the liquid has a fairly definite volume.
Kinetic Theory Of Gases:
The kinetic theory of gases is briefly given in the table below