Hail
The ice crystals that fall from the sky are called snow or snowflakes.
snow or hail
no Ice particles fall from the sky but Ice crystals form on the ground.
Snow
'Sleet' or 'hail'.
The process of water droplets or ice crystals falling from the sky is called precipitation. .
It is called hail
snowflakes
Ice crystals falling from the sky are not branched like snowflakes, but tend to be more needle-like. They weigh less than snowflakes, and therefore can seem almost suspended in the air. They often cause strange optical illusions as light reflects off them; at night, light appears to shoot straight up into the sky like a pillar. They are also responsible for "sun dogs", the rainbow like bars that can appear on either side of the sun.
This is precipitation, part of the water cycle.
Precipitation is the process of water droplets or ice crystals falling from the sky.