What you need:
A spoon, a candle flame and some warm water
What you do:
Heat the spoon over the candle flame.
Put a drop of warm water into the spoon.
What you observe:
The water sizzles and evaporates and the spoon becomes slightly cool.
How does the spoon become cool?
Evaporation is a cooling process. The spoon becomes cool due to the evaporation of water from it.
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