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Transcript
Earth Rocks Science & Minerals GRANITE The contents of rocks What are rocks made of? One or more Minerals What are mineral? Minerals are natural, non-living solid crystals that make up rocks. Granite Granite is one of the most common rocks in the world. What 3 minerals? What is the rock, granite, made of? Quartz Feldspar Mica What 3 minerals? What is the rock, granite, made of? Quartz Quartz is one of the most common minerals in Earth’s crust. What 3 minerals? What is the rock, granite, made of? Feldspar Potassium feldspars contains potassium. Feldspar crystals are stubby prisms, often pink to white. What 3 minerals? What is the rock, granite, made of? Mica All micas form flat, book-like crystals that peal apart into individual sheets on cleavage planes. Crystals cleave into smooth flakes. Mica is so soft that you can scratch it with a fingernail. A property of minerals What is cleavage? Mica The tendency of a mineral to break along weak planes. Granite What thinking map can we use to illustrate granite and the minerals it’s made of? Mica pink granite Lizard on gray granite
