What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?

Classify if polyurethane is amorphous or crystalline solid.

Classify if naphthalene is amorphous or crystalline solid.

Classify if benzoic acid is amorphous or crystalline solid.

Classify if Teflon is an amorphous or crystalline solid.

Classify if Potassium nitrate is an amorphous or crystalline solid.