MVM 6th Grade Science - Sect 2.2 Study Guide
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MVMSchool Plus on November 8, 2011
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14 terms
Terms | Definitions |
|---|---|
 streak | the color of a mineral powder left behind when a mineral is scraped across the surface; a method for classifying minerals |
| luster | the property of a mineral that describes the way in which the light reflects from the surface. Major types of luster are metallic and nonmetallic. |
| cleavage | the property of a mineral that describes its tendency to break along flat services. |
| fracture | the tendency of a mineral to break into irregular pieces. |
| density | a property of matter representing the mass per unit volume. |
| hardness | the resistance of a mineral or other material to being scratched. |
| color and luster | What two ways can the appearance of a mineral help to identify? |
| it may have tiny amounts of an element in it, it may be in contact with the atmosphere or water, and the crystals can have defects in the structure | Why can minerals be more than one color? |
| Each kind of mineral always breaks in the same way. | Why can the way a mineral breaks up help identify it? |
| Because there are no particular directions of weakness in its crystal structure. | Why do some minerals break by fracturing? |
| density and hardness | What are to properties of minerals that you could sense with your eyes closed |
| diamond is the hardest mineral, talc is the softest mineral, harder minerals have stronger bonds, and softer minerals have weaker bonds. | These are qualities of hardness... |
| Quartz would scratch calcite because it is harder than calcite. | Which mineral would scratch the other ports are calcite? |
| fluorescence, respond to magnets, are radioactive, and react to acids | What are four special properties of some minerals? |
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