Greetings
The C major scale and all major scales are based on the same pattern with respect to the distance between each note, that is - tone, tone, semi-tone, tone, tone, tone, semi-tone.
Semi-tone = black key to white key or white key to black key with the exception of B to C and E to F.
The C major scale of C D E F G A B C, follows the above pattern and has no sharps or flats.
Minor scales are three semi-tones lower than major scales, thus the relative minor scale of C major is A minor.
There are three types of minor scales.
1. Natural minor - A B C D E F G A - has the same notes as C major ascending and decending.
2. Harmonic minor - raises the 7th note by a semi-tone ascending and descending
- A B C D E F G# A G# F E D C B A
3. Melodic minor - raises both the the 6th and 7th notes ascending and lowers these notes decending - A B C D E F# G# A G F E D C B A.
Cheers
allthumbs