examination of materials
121Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
122chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
123Delhi Conspiracy Commission — The Chief Commissioner of Delhi, exercising his special powers under section 3(1) of the Code of Criminal Procedure, issued an order dated April 9, 1930 constituting a commission, which was known as the Delhi Conspiracy Commission. The Commission …
124GENIZAH, CAIRO — Introduction The term genizah is a word shortened from the rabbinical Hebrew phrase bet genizah (see also genizah ). Its counterpart in late biblical Hebrew is genez (pl. genazim, ginzei) which in Esther evidently means a treasury, as well as the …
125metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …
126Natural science — Part of a series on Science …
127Aeroponics — is the process of growing plants in an air or mist environment without the use of soil or an aggregate medium. Aeroponic culture differs from both hydroponics and in vitro (Plant tissue culture) growing. Unlike hydroponics, which uses water as a… …
128Ontario Centre of Forensic Sciences — Agency overview Formed 1966 Preceding agency Attorney General’s Laboratory Jurisdiction …
