I am doing a science fair project about which wood burns longest so can anybody help me:-). if you can thanks.

Answer 1

The denser the wood, the slower it will burn. Hardwoods like oak will burn slowly. Softwoods (such as pine) burn quickly and this is partly because of their open structure, which allows air to get to the fibres, and partly because they produce pine resin, which contains turpentine (flammable).

Coal is made of fossilised wood, and an intermediate step in the fossilisation is lignite, a stage that is more wood than coal.

One of the densest woods is ebony, which will burn very slowly.

Now to turn it on its head! Balsa is technically a hardwood, but it is spongy and open grained, and burns quickly.

Answer 2

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Answer 3

ebony will burn slow but the only tree your going to find (maybe) in the US, in the ebony familly, is persimmon (Diospyros vrginiana). osage orange (Malura pomifera) is the hardest, densest wood and burns the hottest. how 'slow' it burns depends on how dry it is but it is the best firewood in a stove. in a fireplace not as good b/c it tends to 'pop' sparks a lot.

coal has about 25 million btu's per ton, and thats of the best quality anthracite coal you can get. osage orange has about 32 million btu's per chord and about 2.5 tons in a chord. hickory is around 28 millions bpc, locust around 27, apple 27, white oak 28, red oak 26, sugar maple 26... i find oak burns the slowest but not always the hottest. some softer woods burn very slow at first if they're still 'green' (fresh cut) then just incinerate.

Answer 4

the best way to answer this is just to say ... the time to make your project depends on how neat and organised you are... if you set up a plan or a scetch you are better off even if it takes a few extra seconds in the begining in the long run it will help you.