black stuff appears on metal when fire.

Subject: black stuff appears on metal when fire.

Date: Thu Jul 8 19:42:27 1999
Posted by Rinoc
Grade level: 4-6 School: No school entered.
City: Vaughan State/Province: Ontario Country: Cananda
Area of science: Physics
ID: 931480947.Ph

Message:


There is a candle on the table, you take a metal knife and put 
it over the fire. Some black fumes rise and when you look a the 
knife you find some black stuff that comes off when you rub it. 
It also happens to various other objects. What is it and how 
does it form?

Re: black stuff appears on metal when fire.

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