Is bubbly champagne heterogeneous mixture or homogeneous mixture?

A heterogeneous mixture is a mixture in which the components are not uniformly distributed throughout the mixture. In other words, the mixture has two or more phases, and the composition of the mixture varies from one phase to another.

Bubbly champagne is a heterogeneous mixture because it contains two phases: liquid champagne and gas bubbles. The liquid champagne is the continuous phase, and the gas bubbles are the dispersed phase. The gas bubbles are not uniformly distributed throughout the champagne, so the composition of the mixture varies from one part of the champagne to another.