Matching Pairs Melody and HarmonyOnline version 1 ESO, bilingual, melody and harmony by Gustavo Porras Funes 1 2 Interval 3 4 The melody that becomes the core of a musical piece 5 6 7 Semitone 8 9 10 Melody Melody Distance between two sounds Theme Lowers the note by a half-step Sequence of sounds that express a musical idea Harmony Key signature Scale The shortest distance between two sounds Raises a note by a half-step