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Day 3 notes - Notes Day 3(pages 26-41 1 Abundance of...

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Notes 1/25/08 Day 3- (pages 26-41) 1. Abundance of elements in the earth’s crust a. Ordered in the most plentiful i. Oxygen ii. Silicon iii. Aluminum iv. Iron* v. Calcium* vi. Magnesium* vii. Sodium viii. Potassium* b. * mean they are plant essential nutrients that come from the soil 2. Groups of minerals a. Silicates - any mineral that contains Silicon and Oxygen i. Largest group of minerals 1. Quartz-dominate in sands, resistant 2. Feldspars Amphiboles, pyroxenes, micas a. Can weather to form clay b. Oxides i. Very insoluble ii. Ultament in weathering 1. Hematite (Fe2O3) 2. Goethite (FeOOH) 3. Gibbsite (Al(OH)3) c. Carbonates i. Somewhat soluble ii. React with acid 1. Calcite (CaCO3) 2. Dolomite (CaMg(CO3)2) d. Phosphates i. put in water 1. Apatite [green] (Ca5(OH,F,Cl)(PO4)3) a. main ingredient in bones and teeth e. Sulfates i. Found in dryer areas 1. Gypsum (CaSO4 * 2H2O) a. relatively soluble f. Halides i. Very soluble 1. Halite (NaCl) 2. Sylvite (KCl) [red/brown] 3. Types of Rocks-rocks are made of an assemblage of minerals a. Igneous Rocks i. Formed from the cooling of magma [melted rock]
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