Final answer:
Time values in music are expressed in relative terms, meaning a note's duration is dependent on the tempo and the durations of other surrounding notes in a piece of music.
Step-by-step explanation:
The question concerns the expression of time values in music. In music, time values are not fixed but are expressed in relative terms. This means that the duration of a note is understood in relation to other notes within the piece, rather than having an absolute, fixed duration.
Consider the way a quarter note's duration is perceived. In the context of a piece of music, a quarter note might not always be a precise length of time; instead, its length depends on the tempo set by the composer or conductor. For instance, at a faster tempo, the quarter note would be shorter in duration than at a slower tempo.