In this experiment we'll measure the relative densities of these three substances. Layers of snowflakes on a surface, such as the ground, are simply called snow.
Snow is mostly a combination of snowflakes and air.
When snow melts, the trapped air is released. Thus, the volume of snow is greater than the volume of the liquid water it forms when melted. Not all snow is the same, and snow is not the only form of frozen water. Ice, sleet, and hail are also mostly a combination of frozen water and air. Let's compare the properties of ice and snow around the world, and at the South Pole.