Question

When a scale goes by so fast we almost can't hear the individual notes, it's called

A. through-composed.
B. an operetta.
C. a rondo.
D. a glissando.

Answer 1

It's called d. a glissando (glissando means "to slide" - which is how you play one)

Answer 2

(d) A glissando

Step-by-step explanation:

Glissando :

A fast rising or plummeting of the scale. In the event that a glissando is performed on a piano or harp, only one out of every odd semitone is played, in light of the fact that the finger is drawn crosswise over just the white keys on account of the piano, or the scale accessible on account of the harp. Assuming, be that as it may, a glissando is performed on a stringed instrument, for example, a violin, every semitone would be sounded as the finger is either slid up or down the length of a string, or fingering each note independently. A glissando is additionally conceivable on wind instruments, be that as it may, each note must be fingered independently with the striking exemption of the trombone.Due to the special development of the trombone without any valves or keys, the glissando is anything but difficult to perform.