What is meant by evaporation?
It is the gradual change of a liquid into a vapor.
When water is left in a shallow vessel, what becomes of it?
The water evaporates or passes off into the air.
Do liquids generally evaporate?
Yes; when exposed to the air, nearly all liquids evaporate.
Does water change into steam when it evaporates?
Water does not change into steam when it evaporates.
How, then, does water evaporate?
It passes off into the air in particles or drops so very small as not to be visible.