Snow crystals, basically frozen water molecules, are six-sided ice crystals that form when the air temperature is below the freezing point for water: 32 degrees Fahrenheit, or zero degrees Celsius.
(Snow crystals; are; six-sided ice crystals that form) (six-sided ice crystals; form; T:when the air temperature is below the freezing point for water) (the air temperature; is; below the freezing point for water)
Snow crystals six-sided ice crystals the air temperature
are form is
six-sided ice crystals that form
T:when the air temperature is below the freezing point for water
below the freezing point for water