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Before we begin our new chapter… Please fold a triangle divider into your notebooks and write the following on it: Chapters 2 & 3 – Rocks and Minerals Try to keep your notebooks organized like this… I. Minerals A. What is a Mineral? 1. Naturally occurring a. Not man made 2. Inorganic solid a. Does not come from something that was once living 3. Has a crystal structure a. The particles of a mineral, or crystals, are arranged in certain patterns. 4. Composed of different elements I. Minerals B. How can we identify minerals? 1. Hardness a. 2. Color a. 3. The color of a mineral’s powder; found by rubbing the mineral on a blank tile called a streak plate Luster a. 5. Easily observed property; can only be used for minerals that have the same color consistently (all the time) Streak a. 4. Mohs Hardness Scale The reflectivity of the mineral; is it shiny, dull, glassy, metallic? Density a. The mineral’s mass per unit…regardless of size, density remains the same Let’s Practice Identifying Mineral Properties Mica Sulfur Let’s Practice Identifying Mineral Properties Galena Quartz HOMEWORK • Read Chapter 2, Section 1 (pages 46-54) • Index Cards for bold vocabulary words found on pages 46-54 • Section 1 Review, question # 1 and 5
