Answer mutiple choice question below The salt crystals that we were trying to grow in our experiment attempted to simulate:biomineralizationprecipitation from solutionsolid state diffusionhardening from melt If you can't scratch a mineral with your fingernail, but the mineral itself won't scratchglass either, you can assume the hardness of that mineral to be:between 5.5 and 7between 3 and 5between 1 and 3between a 2 and 6

Answered: The salt crystals that we were trying…

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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Answer mutiple choice question below

The salt crystals that we were trying to grow in our experiment attempted to simulate:
biomineralization
precipitation from solution
solid state diffusion
hardening from melt

If you can't scratch a mineral with your fingernail, but the mineral itself won't scratch
glass either, you can assume the hardness of that mineral to be:
between 5.5 and 7
between 3 and 5
between 1 and 3
between a 2 and 6

Expert Solution

Step 1: Hardness of minerals

The Mohs mineral hardness scale, which gives different minerals a relative hardness value, is commonly used to measure the hardness of minerals. Friedrich Mohs created the scale in 1812, and its foundation is the idea that a tougher mineral can abrasively erode a softer mineral.

Here are the common minerals and their respective hardness values on the Mohs scale:

Talc: Hardness of 1 - It can be easily scratched by a fingernail.
Gypsum: Hardness of 2 - It can be scratched by a fingernail.
Calcite: Hardness of 3 - It can be scratched by a copper penny.
Fluorite: Hardness of 4 - It can be scratched by a knife blade.
Apatite: Hardness of 5 - It can be scratched by a knife blade but not by a penny.
Orthoclase Feldspar: Hardness of 6 - It can scratch glass.
Quartz: Hardness of 7 - It can scratch glass.
Topaz: Hardness of 8 - It can scratch quartz.
Corundum: Hardness of 9 - It can scratch topaz.
Diamond: Hardness of 10 - It is the hardest naturally occurring mineral and can scratch all other minerals.