10 help me with this i pay right away 6th grade
Question Description
Assignment: Mineral Identification Investigation
30
Mineral Identification Data Table |
|||
Sample Number |
Color |
Cleavage or Fracture |
Luster |
25 |
|||
26 |
|||
27 |
|||
13 |
|||
7 |
|||
23 |
Analysis
Sample 7: _________________________
Sample 13: _______________________
Sample 23: _______________________
Sample 25: _______________________
Sample 26: ______________________
Sample 27: ______________________
Questions
1. Which mineral above would be the most difficult to scratch?
2. Give two examples of minerals that have a property in common.
3. Could you have identified any of the minerals after having described only a few, rather than all, of the properties you tested? If so, give an example.
4. Why is it still a good idea to test more properties than might be necessary?
Mineral Identification Key
Mineral Identification Key |
||||||
Mineral Name |
Color |
Streak |
Cleavage or Fracture |
Hardness |
Luster |
Special Properties |
Hematite |
Black or red |
Red-brown |
Fracture |
1–6.5 |
Metallic |
Magnetic |
Galena |
Lead-gray |
Gray-black |
Cleavage |
2.5–3 |
Metallic |
Heavy |
Sulfur |
Pale yellow |
Pale yellow |
Fracture |
1.5–2.5 |
Nonmetallic |
Rotten-egg odor |
Calcite |
Usually white, but can be any color |
White |
Cleavage |
3 |
Nonmetallic |
Fizzes in acids |
Quartz |
Clear, white, rose, violet, black |
White |
Fracture |
7 |
Nonmetallic |
None |
Mica |
Black, clear, brown, green, yellow |
Yellow |
Cleavage |
2.5 |
Nonmetallic |
None |
Analysis
Sample 7: _______________________
Sample 13: ______________________
Sample 23: ______________________
Sample 25: -_____________________
Sample 26: ______________________
Sample 27: ______________________
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