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Description
Flashcards by jillian.gaines.j, updated more than 1 year ago
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Created by jillian.gaines.j
almost 9 years ago
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| Question | Answer |
| Define Ore | A rock that contains a mineral that can be extracted (mined for profit) |
| What are 3 characteristics of a gem? | Rare, valuable, and hardness (5.5+) |
| Define silicates | Group of rock forming minerals that contain the elements silicon and oxygen. (MOST COMMON GROUP) |
| What is one way a mineral forms? | Solution: dissolved minerals are in a liquid that evaporates. (hot or cool) Example: Halite; Gold |
| What are the 5 characteristics of minerals? | 1. Naturally occurring: Not man made 2. Inorganic: Not living nor ever was 3. Solid: Not a liquid or a gas; unchanging shape and volume 4. Crystalline Structure: Pattern of atoms 5. Definite Chemical Composition: Unchanging recipe of elements |
| What is the most unreliable test to identify a mineral? | Color |
| What are the 7 ways to identify a mineral? | 1. Color 2. Cleavage and fracture 3. Density 4. Hardness 5. Streak 6. Luster 7. Special properties |
| Why is color un reliable? | Color; Not reliable; Many minerals are the same color; some minerals come in a variety of colors |
| Define cleavage and fracture | The way a mineral breaks Smooth- Cleavage Jagged- Fracture |
| Define Density | Mass/Volume **VERY RELIABLE** 1- Mass + weigh it 2- Volume + water displacement |
| Define Hardness | A minerals resistance to being scratched 10- Diamond (hardest) 1- Talc (softest) Fingernail= 2.5 Penny= 3.5 Iron nail= 4.5 Glass= 5.5 RANGE: (0-2.5) (5.5 or 5.5+-10) |
| Define Streak | The color of the mineral in powder form; Use a streak plate |
| Define Luster | It's direclty related to chemical composition of minerals; How light interacts with a mineral; Examples: Metallic, waxy, wavy, dull, glassy |
| What is one way a mineral forms? | Magma/lava cooling: Crystal size: amount of time and space Small= fast cooling with large space or small space; slow cooling with small space Large= Lots of time to cool AND lots of space |
| Define Special Properties | TEXTURE, smell, conductivity, magnetism, reaction to acid, glows under a black light, TASTE |
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