Music - the art of organizing sound structures in time. One of the fields of fine arts that affects the human psyche through sounds.
Rock - a genre of entertainment music created in the mid-twentieth century in the United States (who created around himself a circle of youth subculture and the general name of many styles of music, derived from rock and roll and blues). The name "rock" is an abbreviation of "rock and roll", although these two concepts can be considered as different musical genres.
All rock styles are characterized by sounds based on different types of guitars (usually electric, electric bass) and drums, with a distinct rhythm and singing, derived from blues, and the way of free improvisation while playing songs, derived from jazz. An important feature of rock music, absent in classical music, is teamwork in the process of creation; music is in fact created in a group and difficult to play, when it is not played by an original band, it is also often composed in a group.
I'm from Poland so i want to tell something about my country in this topic. Polish rock music, initially identified with rock and roll, and euphemistically called "big beat" for political reasons, appeared sporadically in the stages after October 1956 as a manifestation of a "thaw" that partially lifted the ban on Western music in socialist realism, this jazz and rock and roll. In 1957, the dixieland Krakow band of S. "Drążek" Kalwiński presented hits from the repertoire of B. Hayley and Elvis Presley performed by the Polish-Canadian singer J. Jaworska-Rogers.