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    | • | _____: atoms or
    molecules are close together in 
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    |  | orderly array;
    fixed volume and shape. 
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    | • | ______: atoms or
    molecules are close together but 
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    |  | relatively free
    to move about; has a definite 
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    |  | volume but takes
    on shape of container 
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    | • | ___:  atoms or molecules are widely separate
    and 
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    |  | 
   
    |  | free to move
    about; have no definite volume or 
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    |  | 
   
    |  | shape--expand to
    fill entire container 
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