The liquid state of a substance is characterized by the fact that the substance retains its volume, but does not retain its shape. The distances between liquid molecules are comparable to their size. Molecules vibrate randomly around the equilibrium position. At the same time, they easily change their place of balance and jump into a new position. Thus, molecules can move around inside the liquid.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.