Earth Materials

Earth Materials - Earth Materials Minerals, Rock (Text...

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Earth Materials – Minerals, Rock (Text Chapter 3) Internal makeup of planet earth - Mantle: rocky earth (silicate minerals) - Core: Nickel- iron metallic core - The high temperatures deep in the earth don’t melt the rock because there is increased pressure counteracts the effects of melting at high temperatures. - The earth’s crust and mantle are made up of rocks, the minerals which make them up, and the combinations of Earth’s naturally occurring 92 elements within those minerals. - Close inspection of the “granites” that make up Yosemite’s famous cliffs reveal that these rocks are made up of diverse and distinctive minerals. - Rocks are aggregate of minerals Minerals - Naturally occurring inorganic chemical compounds - Crystalline internal structure - Definite [eg. SiO 2 ] or fairly definite [eg. (Fe, MG) 2 SiO 4 ] chemical composition - Definite or fairly definite physical properties (eg. Color, cleavage, streak, luster, crystal appearances) A few of earth’s 92 naturally occurring elements occur in the native (pure) state as minerals- gold, silver, iron, copper, sulfur, and carbon (as both diamond and graphite) The Cullinan diamond (the largest gem from the original stone of 3106 carats) cut to-530.2 carats Diamonds (C for carbon) are the best example of one of the ways (minor) in which minerals are formed by covalent bonding . Covalent bonding
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Earth Materials - Earth Materials Minerals, Rock (Text...

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