Hard and Soft Woods
There is a strong relationship between the properties of wood and the properties of the particular tree that yielded it. The density of wood varies with species. The density of a wood correlates with its strength (mechanical properties). For example, mahogany is a medium-dense hardwood that is excellent for fine furniture crafting, whereas balsa is light, making it useful for model building. One of the densest woods is black ironwood.
It is common to classify wood as either softwood or hardwood. The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood. These names are a bit misleading, as hardwoods are not necessarily hard, and softwoods are not necessarily soft. The well-known balsa (a hardwood) is actually softer than any commercial softwood. Conversely, some softwoods (e.g. yew) are harder than many hardwoods.
Read more about this topic: Wood
Famous quotes containing the words hard, soft and/or woods:
“Mary: Oh, Dan, when is this trouble going to end? This killing and more killing.
Dan: It’s hard on you women, I know. You’re braver than we are.”
—Dudley Nichols (1895–1960)
“I’ve sometimes thought ... that the difference between us and the English is that the Scotch are hard in all other respects but soft with women, and the English are hard with women but soft in all other respects.”
—J.M. (James Matthew)
“The natural historian is not a fisherman who prays for cloudy days and good luck merely; but as fishing has been styled “a contemplative man’s recreation,” introducing him profitably to woods and water, so the fruit of the naturalist’s observations is not in new genera or species, but in new contemplations still, and science is only a more contemplative man’s recreation.”
—Henry David Thoreau (1817–1862)