Bits of ice crystals that form in clouds may fall to the ground as snow.

Here's why:

* Formation: Ice crystals form in clouds when water vapor freezes onto tiny particles like dust or pollen.

* Growth: As the ice crystals fall through the cloud, they collect more water vapor and grow larger.

* Precipitation: When these ice crystals become heavy enough, they fall to the ground as snow.

Let me know if you have any more questions!