Solid :it is having a definite shape 
        :the molecules are tightly packed in solids 
        :it has a fixed volume
        :it is not easily compressible 
        :the particles in solids doesn't flow easily  

Liquids:the molecules are loosely packed in liquids. 
          :the take the shape of the container. 
           :particles in liquids can move. 
           :it has a fixed volume 

gas :the molecules a very loosely packed 
       :the have lots of space between them 
        :it doesn't have volume.