Clouds form when the atmosphere can no longer hold all of the invisible water vapor so it condenses into water droplets or ice crystals.
(the atmosphere; can hold; all of the invisible water vapor; T:Clouds form; T:no longer) (it; condenses; into water droplets or ice crystals)
the atmosphere it
can hold condenses
all of the invisible water vapor T:Clouds form T:no longer
into water droplets or ice crystals