Scales refer to a series of notes that go in an ascending and descending manner. The major scale is the foundation from which all other scales are formed.
A major scale is a diatonic scale. The sequence of intervals between the notes of a major scale is: “whole, whole, half, whole, whole, whole, half”, where “whole” stands for a whole tone, and “half” stands for a semitone. A major scale may be seen as two identical tetrachords separated by a whole tone. Each tetrachord consists of two whole tones followed by a semitone: “whole, whole, half“. The C major scale begins with a C and ends with a C. The same rule applies with the rest of the keys where a D Major Scale begins and ends with a D and so on. The notes on a major scale is numbered from 1 to 8, this signifies the intervals.