In music a heptatonic scale is a scale (music) with seven (hepta) degrees. Examples include the diatonic scales include the major and minor scales and the musical modes. Wikibooks Wikiversity has more about this subject: School of Music Look up Music in Wiktionary, the free dictionary Wikicities has a wiki about Music: Music Music City : a collaborative music database All Music Guide: includes a comprehensive and flexible Genre and Style system MusicWiki: A Collaborative Music-related encyclopedia Science... In music, a scale is an unordered collection of notes or pitches, as opposed to a series of intervals, which is a musical mode. ... In music or music theory a scale degree is an individual note of a scale, both its pitch and its diatonic function. ... In music theory, a diatonic scale is a scale whose notes are built on the natural staff positions of lines and spaces, with no accidentals, with or without a key signature. ... In music theory, the major scale is one of the diatonic scales. ... A minor scale in musical theory is a diatonic scale whose third scale degree is an interval of a minor third above the tonic. ... In music, a mode is an ordered series of musical intervals, which, along with the key or tonic, define the pitches. ...