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Clay Hensley, Hensley
Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4). Clays develop plasticity (physics), plasticity when wet, due to a molecular film of water surrounding the clay particles, but become hard, brittle and non–plastic upon drying or Pottery#Firing, firing. Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide. Clay is the oldest known ceramic material. Prehistoric humans discovered the useful properties of clay and used it for making pottery. Some of the earliest pottery shards have been radiocarbon dating, dated to around 14,000 BC, and clay tablets were the first known writing medium. Clay is used in many modern industrial processes, such as paper making, cement production, and chemical filter (chemistry), filterin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gay Head Cliffs MV
''Gay'' is a term that primarily refers to a homosexual person or the trait of being homosexual. The term originally meant 'carefree', 'cheerful', or 'bright and showy'. While scant usage referring to male homosexuality dates to the late 19th century, that meaning became increasingly common by the mid-20th century. In modern English, ''gay'' has come to be used as an adjective, and as a noun, referring to the community, practices and cultures associated with homosexuality. In the 1960s, ''gay'' became the word favored by homosexual men to describe their sexual orientation. By the end of the 20th century, the word ''gay'' was recommended by major LGBT groups and style guides to describe people attracted to members of the same sex, (Reprinted fro American Psychologist, Vol 46(9), Sep 1991, 973-974) although it is more commonly used to refer specifically to men. At about the same time, a new, pejorative use became prevalent in some parts of the world. Among younger speakers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
