* Heterogeneous mixtures have components that are visibly different and can be easily separated.

* Homogeneous mixtures have components that are evenly distributed and cannot be easily separated.

In the case of ice and water:

* Ice is a solid, while water is a liquid. They have distinct physical properties.

* You can easily see the ice cubes in the water.

* You can separate the ice cubes from the water by simply scooping them out or letting the ice melt.

Therefore, ice cubes in water fit the definition of a heterogeneous mixture.