What is the physical structure of clay?
tiny sheets with water between them.
round spherical shapes with water holding them together.
small partials of glass.

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.

U because i am it just happened

Answer/// geometric period, archaic period,and classical period; geometric period is usually dated from 1000bcthe archaic and classical are 336bc to323bc;