when it burns it crackles and spites and then goes to ashes why
2006-09-30 08:19:46 · 11 answers · asked by jingle janglejayne 1 in Science & Mathematics ➔ Other - Science
because if some one burnt you you'd do something back, ( its because the sap is burning at high temp basically the same effect as oil burning in a fryer.
2006-09-30 08:25:06 · answer #1 · answered by loobyloo87 2 · 0⤊ 0⤋
There is some moisture (usually water) in the wood.
As the wood is burning(getting hotter), the water vaporizes(into gas) fairly rapidly. The pressure of that gas is strong enough to
escape(push out) from the wood, causing it to fracture some of
the wood splinters. We hear this fracturing as "crackles".
The remnants from burned (oxidized) wood are merely ashes(nothing left to burn).
2006-09-30 15:31:48 · answer #2 · answered by michael c 2 · 0⤊ 0⤋
It sounds as though you are talking about burning un-seasoned (fairly freshly cut) wood. As the wood is burns, the sap heats up, expands and tries to escape (hence the noises you hear and the 'spitting' that occurs.
If you burn this type of wood in your fireplace, your chimney becomes well sooted and needs cleaning at least two or three times a year to prevent chimney fires.
Wood cut this year should be stacked and stored (dry) outside to 'season' for at least a year or two, before being burnt. It will burn slower, spit and crack less and give off less soot etc.
2006-09-30 15:45:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋
the splitting is due to the moisture being evaporated, this causes the wood to shrink unevenly and thus it will occasionally split literally pulling itself apart
the cracking will be moisture trapped inside that cannot get out then exploding when the pressure gets too much
The ashes are the carbon residue of the wood which cannot be burnt down further
the spitting are the tiny wood elves casting their magic spells and hurling mini fire balls at you for destroying their homes you damn arsonist
2006-09-30 15:37:58 · answer #4 · answered by Fram464 3 · 0⤊ 0⤋
It's the moisture coming out of the wood as it burns
2006-09-30 15:21:33 · answer #5 · answered by Rach 2 · 0⤊ 0⤋
The water in the wood evapourates out causing the bits of wood to shrink away from each other.
2006-09-30 15:22:49 · answer #6 · answered by The Yeti 3 · 0⤊ 0⤋
as wood burns it heats up and the moisture in it evaporates there fore shinking it so it can't remain attached to itself in some bits
2006-09-30 23:56:33 · answer #7 · answered by Anonymous · 0⤊ 0⤋
when the oxygen inside the wood ignites it causes an explosion and this is what causes the wood to crack
2006-09-30 15:23:23 · answer #8 · answered by kylus 2 · 1⤊ 0⤋
because the moister evaporates and leaves with a kind of sizzle pop
2006-09-30 15:22:45 · answer #9 · answered by [[Elle♥Kay]]™ 2 · 0⤊ 0⤋
its the sap left in the wood.
2006-09-30 15:27:53 · answer #10 · answered by grumpcookie 6 · 0⤊ 0⤋