SmartFigure: Mineral Cleavage – Flashcards
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Part A
Which of the following best describes the term cleavage?
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Cleavage is the splitting of minerals along natural planes of weakness.
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Part B
What causes a lack of cleavage in some minerals?
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Bonds of equal strength in all directions
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Part C
Which of the following exhibits three sets of cleavage at 90° angles?
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Galena
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Part D
Hornblende has _____ cleavage planes at _____ angles.
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two; non-90°
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Part E
Quartz exhibits __________.
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conchoidal fracture