* Air. Snow is made up of 95% air. This is why it is so light and fluffy.

* Water. The other 5% of snow is water. This water is frozen into tiny crystals.

* Minerals. Snow also contains small amounts of minerals, such as dust and salt. These minerals can come from the ground or from the atmosphere.

* Bacteria. Snow can also contain bacteria. These bacteria can come from the air, the ground, or from animals.

* Organic matter. Snow can also contain organic matter, such as pollen and plant debris. This organic matter can come from the air, the ground, or from animals.