The length of time that a note is played is called its…
note duration.
Has the longest note duration in modern music:
Whole note
Has half the duration of a whole note:
Half note
A fourth (or a quarter) of a whole note:
Quarter note
Notes smaller in duration than a quarter note have ___.
flags
Has one flag:
Eighth note
Two eighth notes occupy the same amount of time as one ___.
quarter note
Has two flags, halving the value again:
Sixteenth note
Two sixteenth notes equal the duration of an ___.
eighth note