Both rock and pop have melody-dominated, homophonic musical texture. Both tend to be mainly in 4/4 time signature. Both tend to have formulaic song structure, alternating verse and chorus with...
Pop music (or popular music) is derived from mostly early rock 'n roll as well as jazz music. Most types of music that people listen to on the radio is derived from those two genres.
Music of the Romantic period (most of the 1800s) sounds a lot like early 20th century pop music. The harmonic vocabulary is the same and even the instruments used are the same. Prog-rock bands such...