Condensation

CONDENSATION (small group presentation)

Purpose:
To realize how condensation takes place.
To discover that water vapour can change form, from gas to liquid.

Age:
5+ years

Material:
A tin can, ice cubes and a spoon.

Presentation:
Invite a small group of children to join you.
Have a child add water to a shiny tin can until the can is half filled.
Another may add ice cubes to the water and stir. Place the can in a warm spot and observe.
Soon a thin film of tiny droplets of water will form on the sides of the can and will gradually form droplets.

Note:
This experiment attains the best results when the air is relatively humid.

Exercise 1:
As in presentation.
You may also wish to look at factors which affect the speed of condensation by repeating the experiment in different conditions, i.e., a cold and warm location, a windy and calm location, a dry and humid location.

Exercise 2:
With a small group of children create a miniature water cycle.
Boil water in a pot.
Fill a frying pan with ice cubes and hold the pan approximately ten centimetres above the pot.
A water cycle will be produced as the water vapour from the boiling water is cooled by the cold bottom of the frying pan, causing droplets of water to condense on the bottom of the pan and then drop back into the water.

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