What is the state of aggregation of matter? What is the melting and solidification of crystalline solids?

In physical science, the term aggregate state denotes the physical state of a substance, which is determined by temperature and pressure. There are several states of aggregation of matter, represented by: solid, liquid, gaseous. When melting, the substance passes from a solid state of aggregation to a liquid. The opposite process is called in physical science the solidification process.



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