Asap! 25 points! which property or properties did you find most useful in the identification of the mineral samples? which properties were less useful? be specific in your explanation.

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Explanation:

(This is difficult because you haven't told us which specific minerals you were looking at. If I end an answer with a question mark, you will need to adjust the answer on the basis of whether the mineral was in the group of minerals you studied.)  

2. Why was it important to examine both the colour and the streak of your minerals?  

Because the surface colour of individual minerals can vary considerably but the streak colour is vertually constant & is therefore more characteristic of the mineral.  

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3. Is lustre a good characteristic to use for the identification of minerals? Why or why not?  

Lustre can vary within a particular mineral - calcite might be vitreous or it may be dull. Using lustre for identity often requires a fresh surface if the mineral in anyway oxidises.  

(3 points)  

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4. You have been given a sample of quartz, which has a hardness of 7. How can you use this mineral to determine the hardness of other minerals?  

If the quartz can scratch another mineral, you know that mineral has a hardness of less than 7. If the quartz is scratched by another mineral, you know that mineral has a hardness of greater than 7.  

(3 points)  

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5. Did you notice a distinctive smell for any sample? Describe the odour.  

Native Sulphur? Pungent, Arsenopyrite? Almonds (Needs to be struck with a hammer first though.)  

(3 points)  

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6. Which property or properties did you find most useful in the identification of the mineral samples? Which properties were less useful? Be specific in your explanation.  

The most useful is hardness, fracture, cleavage, streak & sometimes crystal habit. The least useful is colour.

(copied) sorry :\

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

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