Philip Green Educational - Slide Set S46 - Weather

7 – A child is drawing with his finger on a window covered with condensation. The window is cold and when warm air comes into contact with it, the vapour turns back into water.

*Taken from the Teachers’ Notes for this set.

As a very small child I was once severely reprimanded for writing rude words on the bathroom mirror in condensation. They disappeared soon after I wrote them, only to again become legible when one of my parents took a shower. Whoops! An early lesson in covering one’s trail…

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