Geography

Question

mate can scratch a copper penny, but it cannot be scratched by a steel

nail.

6. If the four minerals shown below were placed together in a closed, dry container

and shaken vigorously for 10 minutes, which material would be scratched and

abraded the most?

Quartz

(1) quartz.

(2) amphibole

Amphibole

(3) galena

(4) pyroxene

Pyroxene

Galena

Answer

Quartz would be scratched and abraded the most.

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Quartz is a mineral that has a hardness of 7 on the Mohs scale, which means it is harder than amphibole, galena...