Why are there bubbles formed at bottom of a kettle of hot boilng water ?

Subject: Why are there bubbles formed at bottom of a kettle of hot boilng water ?

Date: Thu Sep 21 16:25:23 2006
Posted by No name entered.
Grade level: 7-9 School: No school entered.
City: No city entered. State/Province: No state entered. Country: Singapore
Area of science: Physics
ID: 1158881123.Ph

Message:


I boiled a kettle( made of stainless steel) 3/4 full with water and let the kettle 
together with the water inside to cool in a basin of tap water. The kettle was then 
immediately placed in the tap water up to half its height. I then noticed that there 
are many tiny air bubbles formed on the outside surface, around the bottom 
circumference of the kettle after about a few seconds to 1 minute. Why are there 
bubbles formed? I would like to know the science behind the phenomenon. Thank 
you for your time. Have a nice day.Hope to hear from you soon.

Re: Why are there bubbles formed at bottom of a kettle of hot boilng water ?

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