Liquid:Liquid is the type of matter that has a definite volume but does not have a definite shape.The particles in a liquid are close to one another but they are not tightly packed together due to the presence of weak forces of attraction between them.They can slide past each other. Gas:Gas is an air-like state of matter that has neither a definite shape nor volume.Gas particles are far apart from one another and have little force of attraction between them.They can move freely in any direction.