Answer:

1. Jazz music commonly uses both the major and the minor pentatonic scales. Pentatonic scales are useful for improvisers in modern jazz, pop, and rock contexts because they work well over several chords diatonic to the same key, often better than the parent scale.
2. In the theory of Western music, a mode is a type of musical scale coupled with a set of characteristic melodic and harmonic behaviors. Musical modes have been a part of western musical thought since the Middle Ages, and were inspired by the theory of ancient Greek music. The name mode derives from the Latin word modus, "measure, standard, manner, way, size, limit of quantity, method".
3. Largo—the most commonly indicated “slow” tempo (40–60 BPM) Larghetto—rather broadly, and still quite slow (60–66 BPM) Adagio—another popular slow tempo, which translates to mean "at ease" (66–76 BPM) Adagietto—rather slow (70–80 BPM) Andante moderato—a bit slower than andante.
4. A nonchord tone (NCT), nonharmonic tone, or embellishing tone is a note in a piece of music or song that is not part of the implied or expressed chord set out by the harmonic framework. In contrast, a chord tone is a note that is a part of the functional chord (see: factor (chord)). Non-chord tones are most often discussed in the context of the common practice period of classical music, but they can be used in the analysis of other types of tonal music as well, such as Western popular music.