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→About Bunsen Burners
: A [[Bunsen Burner]] has a valve at the bottom to allow in [[air]]. This valve can be turned to allow more or less [[air]] for [[combustion]].
: If the valve on a '''Bunsen Burner''' is open it lets a lot of [[oxygen]] in so the flame may appear blue or may be difficult to see. This is a roaring flame at a high [[temperature]].
: If the valve on a '''Bunsen Burner''' is closed less [[oxygen]] gets inso there is [[Incomplete Combustion|incomplete combustion]], so the flame may appear yellowdue to glowing particles of [[soot]]. This 'safety flame' is at a lower [[temperature]]. It is safer because it can be more easily seen and is a lower [[temperature]].
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