Identify the mode characterized by half steps occurring between notes 3-4 and 7-8, akin to playing all white keys from G to G.

The mode characterized by half steps occurring between the 3rd and 4th degrees, as well as between the 7th and 8th degrees, corresponds to the Mixolydian mode. This mode is derived from the fifth degree of the major scale and can be visualized by playing all the white keys on the piano from G to G.

In the context of the scales, this means:

• The tonic note G corresponds to the first degree.

• The sequence of notes G, A, B, C, D, E, F, and then back to G reflects the characteristics of the Mixolydian mode.

• The half step between B (the 3rd degree) and C (the 4th degree), and between F (the 7th degree) and G (the octave), are defining traits of this mode.

The Mixolydian mode sounds distinct because it has a lowered seventh degree compared to the major scale, contributing to a unique sound that is often found in various genres of music, especially in folk and rock. Thus, the Mixolydian mode fittingly captures the described half-step intervals and the notes from G to G.