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DONE) Can you please check if these are correct? Topic: Minerals.   I have tried it, but not sure. TABLE attached.

DONE) Can you please check if these are correct? Topic: Minerals.   I have tried it, but not sure. TABLE attached.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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(DONE) Can you please check if these are correct? Topic: Minerals.

 

I have tried it, but not sure. TABLE attached.

Mineral Hardness Talc 1 Gypsum 2 Calcite 3 Fluorite 4 Apatite 5 Orthoclase 6 Quartz 7 Торaz 8 Corundum 9. Diamond 10
Transcribed Image Text:Mineral Hardness Talc 1 Gypsum 2 Calcite 3 Fluorite 4 Apatite 5 Orthoclase 6 Quartz 7 Торaz 8 Corundum 9. Diamond 10
What would you use a streak plate for? To obtain the streak of a mineral, rub it against an unglazed porcelain plate. The streak consists of mineral powder. How soft does a mineral have to be for you to scratch it with your fingernail? A fingernail can scratch minerals like talc and gypsum, with a hardness of 2 or lower. How hard does a mineral have to be for it to scratch a glass plate? Based on Mohs' scale of 3-5 can scratch a glass plate. Describe the difference between cleavage and fracture. Cleavage decribes how a mineral break into flat surfaces. Cleavage is determined by the crystal structure of the mineral. Fracture describes how a mineral breaks into forms or shapes other than flat surfaces. Why is the color not always useful for identifying the mineral? One reason is that it is hard to distinguish between minerals based on color since it may look similar. There's also colorless minerals and colors change on the mineral too, so it's not a useful identification.
Transcribed Image Text:What would you use a streak plate for? To obtain the streak of a mineral, rub it against an unglazed porcelain plate. The streak consists of mineral powder. How soft does a mineral have to be for you to scratch it with your fingernail? A fingernail can scratch minerals like talc and gypsum, with a hardness of 2 or lower. How hard does a mineral have to be for it to scratch a glass plate? Based on Mohs' scale of 3-5 can scratch a glass plate. Describe the difference between cleavage and fracture. Cleavage decribes how a mineral break into flat surfaces. Cleavage is determined by the crystal structure of the mineral. Fracture describes how a mineral breaks into forms or shapes other than flat surfaces. Why is the color not always useful for identifying the mineral? One reason is that it is hard to distinguish between minerals based on color since it may look similar. There's also colorless minerals and colors change on the mineral too, so it's not a useful identification.
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