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MEYCAUAYAN NATIONAL HIGH SCHOOL Senior High School EARTH & LIFE SCIENCE First Grading Period – First Semester Project # 1: Mineral Identification INTRODUCTION A mineral is a naturally occurring, inorganic substance that is solid with orderly crystalline structure and has a fixed (or uniformly variable) chemical composition. It is composed of an ordered arrangement of atoms chemically bonded together to form a particular crystalline structure. Minerals can be identified by its physical and chemical properties. Useful physical properties include luster, hardness, crystal form/habit, color, streak, diaphaneity, cleavage, fracture, specific gravity, and tenacity. Solubility and melting point, on the other hand, are chemical properties that are commonly used to describe a mineral. OBJECTIVES: · demonstrate understanding about physical and chemical properties of minerals; · identify common laboratory minerals by “testing” their physical and chemical properties; · prepare for an exhibit of all identified minerals; and · draw logical conclusions about the activity. Material/s · Copy of Mineral Physical Properties and Identification Procedure: 1. Click on this link to access the mineral identification chart: http://profharwood.x10host.com/GEOL101/Labs/Minerals/index.htm?fbclid=IwAR1oGCAikOrPzhjXHAXDrT0tKv9-54BRx1U2nHdoN2xar9TLYxMTCqVWZSE 2. Recall ideas by reading the Mineral Physical Properties Chart. 3. Screenshot Mineral Identification - Diagnostic Physical Properties part for later use. 4. On the latter part of the document, click your assigned sample to start identifying minerals. 5. Upon clicking, you will be directed to your assigned mineral. Start the physical properties testing by clicking on these buttons (Note: record all your observations): 5.1 For hardness, click the hardness test from 1 to 10 and use your understanding about Mohs Scale of Hardness (remember, the harder material will always scratch the softer one). You will be notified if the sample was scratched or not. 5.2 For Cleavage/Fracture, you will know if the mineral exhibits 1-6 directional cleavage or irregular/conchoidal fracture. 5.3 For streak test, you will be notified of the color of the sample in powdered form. 5.4 For magnet test, you will see if the magnet is attracted to the sample or not. 5.5 For hydrochloric acid test, either the sample reacted to the acid or not. 5.6 For taste test, if the sample has discernable taste or none. 5.7 For color, crystal form, and luster, you will have to observe it yourself. 6. Click all the data on the Mineral Identification Worksheet. 7. Using the Mineral Identification - Diagnostic Physical Properties you have copied earlier, identify which among the listed minerals exhibits the data you have recorded. Once decided, click the mineral name: 8. To finish, click ‘Grade Identification’. Guide questions: 1. What are the physical and chemical properties of your identified mineral? 2. Where is it usually found? 3. List down some uses and interesting facts about it. RESULTS (Insert Mineral’s Image Here) Physical Properties Results Sample Number Color Luster Hardness Cleavage/Fracture Streak Attraction to Magnet Hydrochloric Acid test Taste test MINERAL NAME CONCLUSION (Form your conclusion about the experiment. Answer the above guide questions and indicate if the objectives of this experiment are achieved.) REFERENCES (Properly cite your sources) Submitted by: (Section) · Name · Name · Name Submitted to: Ms. Kimberly Mae S. Isaac 14