Give examples of the practical use of the transition of a substance from one state of aggregation to another.

Metallurgists melt metals to make alloys from them. Steam. obtained by heating water, is used to generate electric current in power plants. Liquefied gases are used in refrigeration units.

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.