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Name: Helen P.
Status: student
Age: 14
Location: N/A
Country: N/A
Date: 2001-2002
Question:
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?

Replies:
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 (convection).

Hope I did not confuse you more.

-Wil Lam


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