The natural minor scale has seven unique pitches with whole steps separating adjacent tones except for half steps between the second and third degrees and between the fifth and sixth degrees.

Whole Step  – Half  Step – Whole Step – Whole Step – Half Step – Whole Step – Whole Step

The natural a minor scale contains the same notes as the C Major scale and can be thought of as a major scale from the sixth to sixth degree.

A – B – C – D – E – F – G – A (A minor scale)