Music is sound and silence organized in time. Music is sound that you want to hear as music. Acoustics is the science of sound which involves the physical characteristics of music.
Music moves through time.
To appreciate music it is important to remember what has happened and to anticipate what is about to happen. Music is notated with a score and it is also improvised. Music is able to move the mind, heart, and body. Musicians just use pitch or an individual tone. Tempo is the rate of speed of the beat.