Glass

__Oral Presentation__ Glass Glass is a fragile and transparent material. Glass is a good thermal conductor, but not a electrical conductor. In the glass the light is, in part, reflected on the surface, and in part absorbed. Glass doesn't transmit UV rays, but it does transmit infrared radiation, that is why everything behind a glass gets hot. Glass is used on jewelery, windows, optical instruments. There are many types of glass and depending on the type we can make bottles, light bulbs, cars windows, among other.

**__The use of glass in architecture and urban planning in Caracas__ ** Glass has been used since the Roman imperial times and, through time and civilizations, it has been used in architecture for making windows, doors, walls and even to cover up a whole building. In Caracas is more often to see the use of glass in architecture, in contrast with urban planning. In our city, characterized by a poor organization, glass is principally used in windows and doors. For more demanding and expensive tastes, glass can be used with steel to cover all the building, as we can see in the "Cubo Negro", the "Polar Tower", the "Banesco Tower", the "Movilnet Tower" in "El Recreo", among others. In homes, glass is not very used, first, because of the tempature complications that brings our tropical weather, and second, because most of the building constructions are multi-familiar and people can't afford the prices of buildings with this material.