Name: Helen P.
Please can you tell me whether convection only
travels in currents (caused by changes in density)? If so how are
draughts (through windows and doors) caused by convection?
Convection is the transfer of heat from an object to a
fluid, or vise versa. The fluid could be air, water,
etc. The fluid has to be moving though.
The difference between convection and conduction is
like if you have a hot brick, and you either let it
cool in your hands (conduction), or you toss it away
Hope I did not confuse you more.
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Update: June 2012