ESS102H1 Chapter Notes - Chapter 2: Van Der Waals Force, Mohs Scale Of Mineral Hardness, Covalent Bond

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13 Jul 2012
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Geologists study minterals both to understand the formation of rocks and to locate and extract resources that you use every day. Many rocks look uniform from a distance, but upon closer examination clearly consists of smaller components called minerals. Luster the property that describes how mineral surfaces reflect light. Crystal faces distinct faces that minerals have which are smooth, flat surfaces with regular geometric outlines. Specific gravity the weight of a material in air divided by the weight of an equivalent volume of water at 4 degrees celcius. Hardness a measure of the resistance of a mineral surface to scratching. It is a relative scale with values b/w 1 - 10. Cleavage describes the flat, smooth planes along which some minerals break and the shape of the resulting fragments. Non-uniform breakage is fracture, rather than cleavage. Color is not always a reliable property for identifying a mineral because many minerals can have the same color.

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