1. 1 READ: Half Step

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Half Step

This distance between two pitches is called the interval between them. By definition, the interval from one note to the next closest note higher or lower is called a half step (figure 1. 1. a)

Half Steps

                          figure 1. 1. a

In staff, it looks like this figure 1. 1. b from middle C to treble C. We also call this type of scale a Chromatic scale. 
One Octave Chromatic Scale
 figure 1. 1. b