Two experiments were
conducted to observe condensation and presence of water vapour in the air. In
the first experiment, a student was asked to breath out onto a mirror and a
film of moisture appeared on its
surface. This happened because the warm air which was exhaled had water vapour
in it. This cooled down when it came in contact with the cold surface of the
mirror.
In the second
experiment, a cold glass of water with ice was kept for observation. The
students observed the water droplets on the outer surface of the glass which
was due to the water vapour present in the air. These activities made them
understand the presence of water vapour in the air.
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