Exam 2 study guide

Exam 2 study guide - Introductory Geology I: Planet Earth...

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Introductory Geology I: Planet Earth (01:460:100:10) Important concepts for Exam 2 Lecture 5 Minerals Minerals are the building blocks of rocks. Definition of a mineral: a naturally occurring, inorganic solid with a regular internal atomic structure and a specific chemical composition A crystal lattice is a 3-dimensional arrangement of atoms. A mineral’s internal structure and chemical composition controls its external appearance and physical properties The physical properties of minerals are used to identify them. Key properties are: color, streak, luster, hardness, specific gravity, crystal habit, crystal form, fracture and cleavage (know what they are). In specific cases, other properties such as taste, texture, magnetism, fluorescence or effervescence can also be helpful. Major mineral classes based on composition include silicates, oxides, carbonates, native elements, sulfates and sulfides. Silicate minerals are the most common minerals in the Earth’s crust. They are the majot rock forming minerals. Silicate minerals are made up of silica tetrahedral and cations. They are classified based on the number of shared oxygen atoms. This determines the minerals complexity and physical properties. Know the major categories of silicate minerals. Textbook reference: Chapter 5
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Exam 2 study guide - Introductory Geology I: Planet Earth...

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