To which bodies are the terms melting and crystallization applicable?

The terms melting and crystallization apply only to crystalline bodies. Their main feature is the presence of a certain melting point (and crystallization). When heated, melting occurs with the absorption of a certain amount of heat without increasing the temperature; when crystallizing in the same amount, heat is released without lowering the temperature.

Amorphous bodies do not have a specific melting point. They soften gradually when heated.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.