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Galena - cause of the hardness of only 2.5
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∙ 12y ago
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How do you get the specific gravity of a mineral?
Fill a beaker with water, and weigh it. Weigh a sample of the mineral. That's the mass of the mineral. Put the sample in the beaker and weigh that. The weight of the water-filled beaker plus the weight of the mineral sample will be greater than the weight of the beaker with mineral sample and water. The difference is the weight of the displaced water, in grams. The volume of the mineral sample, in cubic centimeters is equal to the weight of the displaced water, in grams. Calculate the specific gravity of the mineral by dividing the weight of the mineral sample by the volume of the mineral sample. Example: your beaker weighs 40 grams. Filled with water, it's 1040 grams. The sample of mineral weighs 160 grams. The beaker with the sample of mineral and water weighs 1179.7 grams. The mineral, and the beaker with water would have a combined weight of 1200 grams, but the beaker with mineral and water weighs 20.3 grams less than that, so the mineral sample is displacing 20.3 cubic centimeters of water. Given a mass of 160 grams and a volume of 2.03 CC, the specific gravity would be found by dividing 160 by 20.3. It's 7.85. (Which happens to be the specific gravity of some iron.)
Describe what would happen if you rubbed a mineral with a mohs hardness value of 7 against a mineral with a value of 5?
The 5 hardness mineral would like suffer scratches or abrasion.
Coastal regions are often affected by abrasion what process would cause increased abrasion along a coastal region?
Stormy weather.
If three rocks have the same mass will the weathering rate be the same?
Not necessarily. Weathering rates would depend on the rock type, mineral composition, and density. These factors will determine a rock's resistance to acidic rainwater, freeze/thaw cycles, and abrasion.
What transport processes would likely dominate a muddy stream A solution B traction C saltation D suspension E abrasion?
abrasion
How do you calculate mineral contents of the sample?
We would need to know what sample you are referring to in order to answer this question.
What would you observe in a streak test?
You would observe the true color of a mineral as represented by the powder created by abrasion with the streak plate.
How do you get the specific gravity of a mineral?
Fill a beaker with water, and weigh it. Weigh a sample of the mineral. That's the mass of the mineral. Put the sample in the beaker and weigh that. The weight of the water-filled beaker plus the weight of the mineral sample will be greater than the weight of the beaker with mineral sample and water. The difference is the weight of the displaced water, in grams. The volume of the mineral sample, in cubic centimeters is equal to the weight of the displaced water, in grams. Calculate the specific gravity of the mineral by dividing the weight of the mineral sample by the volume of the mineral sample. Example: your beaker weighs 40 grams. Filled with water, it's 1040 grams. The sample of mineral weighs 160 grams. The beaker with the sample of mineral and water weighs 1179.7 grams. The mineral, and the beaker with water would have a combined weight of 1200 grams, but the beaker with mineral and water weighs 20.3 grams less than that, so the mineral sample is displacing 20.3 cubic centimeters of water. Given a mass of 160 grams and a volume of 2.03 CC, the specific gravity would be found by dividing 160 by 20.3. It's 7.85. (Which happens to be the specific gravity of some iron.)
What equation would you use to express the density of a mineral sample?
density = mass / volume
What is the hardness of anthracite coal?
Because it is a rock, not a mineral, the Mohs value will vary significantly from sample to sample. An average range would be between 3.0 and 3.8.
Describe what would happen if you rubbed a mineral with a mohs hardness value of 7 against a mineral with a value of 5?
The 5 hardness mineral would like suffer scratches or abrasion.
Why is a crystal of pure calcium carbonate made in a lab not a sample of the mineral calcite?
Well as a chemist i would say it is. Most mineral samples are slightluy contamnated, whereas synthetic calcite is not.
Distinguish between a gross sample and a laboratory sample?
In geology say, a gross sample would be a representative sample of the whole rock. A lab sample would be a fraction of that, refined such that measurements are able to be made on a single mineral. for example, a piece of basalt would be a convenient field (gross) sample, from which say, mica is extracted after grinding and separation, to enable the 'date' of the basalt to be determined. Similar concepts would apply in other fields, such as biology, botany, water sampling and so on.
Would abrasion be easily infected?
yes
Which information would probably be most helpful to someone trying to identify a mineral sample?
Many igneous rocks can be identified by the position of their minerals.
How would you code Abrasion elbow?
Use ICD-9 code 913.0 for abrasion of elbow. The ICD-10-CM code for abrasion of elbow is S50.31- with an additional character to identify the side
How would you explain the process of abrasion?
Abrasion is the grinding and wearing of rock surfaces through mechanical action of other sand particles.
