Thursday, November 17, 2005

Wood




The wood is the hard part of the trees that is underneath the crust. According to the type of tree, there are hard wood and soft wood.
The wood is the raw material better used by the man. It is obtained from the trees that conform the Earth forests.
The forests occur in very different climates but all must have sufficient humidity for the development of the trees One is used, in addition, in constructing houses; it is used as stakes to surround earth; in the construction of boats; in domestic utensils (like the "dogs" for the clothes); in vasijas for wine, and thousand different applications. He was one of the materials firstly used by the man. In the Paleolítico the hard wood for arms was already distinguished, axes, thorns, and the light and soft wood for woods and twigs. When the man began to work with metals, they increased the possibilities of the uses of the wood since these allowed their survey and works. In Greece they appear the first own utensils of a carpenter, like the mountain range, we drill, gouge, etc, the first works of stature, bas-relief and the carpentry. Structure of the wood



juegos gratis
juegos gratis

In your opinion, ¿what is the better construction material?