Rocks are classified by *
A) how they are formed
O B) when they were formed
OC) where they were formed
O D) their color when formed

Their color when formed

A) how they are form

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.