Unlike the cheerful major scale, the minor scale is darker.
Minor scales are more introspective and mysterious.
The relationship between 1 major scale and it's cousin the minor scale is the number of sharps or flats. They both have the same number. The C scale is void of any sharps or flats. It's cousin, the A minor scale, is also void of any sharps or flats. Here is a list of the major scales and their cousins, the minor scales.