Answer:
Dissonance: A chord of sounds that are displeasing to the ear
Consonance: A chord of sounds that are sweet and pleasing to the ear
Arpeggio: The notes of a chord played in progression, ascending or descending.
Minor Harmony: Term referring to a sequence of notes that define the tonality of the minor scale
Chord Progression: Chords being played in a sequence
Major Chord: Term referring to a sequence of notes that define the tonality of the major scale.
Tonality: Principle of organizing musical compositions around a central note (the tonic note)