Light a candle and watch the wax go from solid to liquid. Explain the observation.

Wax belongs to amorphous bodies, therefore it does not have a definite melting point. The wax will gradually soften and then flow. Liquid wax flows down again into a more viscous state.

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.