How invisible gas becomes a cloud you can see
What can you see in each of these?
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Water vapour cannot be seen at all.
The visible parts of a cloud are tiny droplets of liquid water or ice crystals — not water vapour. This happens as water vapour rises into the atmosphere, then cools and condenses into clouds.
Condensation is the change of state from a gas to a liquid.
Everyday example: You can see this when water vapour in the air meets a cold surface, such as a window, and condenses into tiny droplets you can see.