Rocks And Minerals Quiz 1

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| By Ieso2009
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Ieso2009
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Quizzes Created: 1 | Total Attempts: 318
| Attempts: 318
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  • 1/10 Questions

    A specimen exhibits strong birefringence, excellent cleavage in three directions, and effervesces when tested with HCl. These are distinguishing characteristics of...

    • Calcite
    • Halite
    • Muscovite
    • Pyrite
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About This Quiz

Explore the fascinating world of geology with Rocks and Minerals Quiz 1. Test your knowledge on Earth's mantle, magma, mineral properties, and more.

Mineralogy Quizzes & Trivia

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  • 2. 

    Which of the following minerals has NO cleavage, and conchoidal fracture?

    • Muscovite

    • Quartz

    • Calcite

    • Halite

    Correct Answer
    A. Quartz
    Explanation
    Think about quartz's crystal structure... no planes of weakness...

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  • 3. 

    Albite is an end member of which mineral group?

    • Orthoclase feldspar

    • Pyroxene

    • Olivine

    • Plagioclase feldspar

    Correct Answer
    A. Plagioclase feldspar
    Explanation
    Not A.

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  • 4. 

    Which of the following minerals is the main constituent of Earth's mantle?

    • Olivine

    • Biotite

    • Feldspar

    • Quartz

    • Magnetite

    Correct Answer
    A. Olivine
    Explanation
    The mantle is primarily composed of peridotite, an ultramafic igneous rock rich in olivine. Peridotite gets its name from its main mineral constituent, peridot, which is gem-quality forsterite, and forsterite is the Mg end member of the olivine group.

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  • 5. 

    Which of the following properties would you best use to distinguish halite from calcite?

    • Streak

    • Color and luster

    • Crystal system and cleavage

    • Taste

    Correct Answer
    A. Crystal system and cleavage
    Explanation
    Well, you could lick your specimen, but nobody would recommend that.

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  • 6. 

    Which of the following minerals is an ore of mercury associated with volcanic activity?

    • Hematite

    • Cinnabar

    • Galena

    • Epsomite

    Correct Answer
    A. Cinnabar
    Explanation
    Probably all you need to know about cinnabar.

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  • 7. 

    What is considered "low" silica content in a magma melt?

    • About 50%

    • About 70%

    • About 20%

    • About 95%

    Correct Answer
    A. About 50%
    Explanation
    You'll never find a melt that's more than about 78% silica. Melts that are less than 45% silica are considered ultramafic - that's very low silica content.

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  • 8. 

    A mineral will scratch apatite, and is scratched by topaz. Which of the following might it be?

    • Olivine

    • Fluorite

    • Corundum

    • Bornite

    Correct Answer
    A. Olivine
    Explanation
    Olivine again!

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  • 9. 

    Which of the following sets of minerals are polymorphs of each other?

    • Quartz and corundum

    • Orthoclase and plagioclase

    • Calcite and dolomite

    • Calcite and aragonite

    • Biotite and muscovite

    Correct Answer
    A. Calcite and aragonite
    Explanation
    Aragonite actually isn't stable under normal conditions, so you'll never find it in surface rocks older than about 50 million years! Still, it's a common collector's specimen.

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  • 10. 

    Which of the native metals gold, copper and silver is the best conductor (1)? Which is most malleable (2)?

    • (1) silver and (2) copper

    • (1) copper and (2) copper

    • (1) copper and (2) gold

    • (1) gold and (2) gold

    • (1) silver and (2) gold

    Correct Answer
    A. (1) silver and (2) gold
    Explanation
    Silver is the best conductor of electricity among the native metals gold, copper, and silver. This is because silver has the highest electrical conductivity of any metal. Gold is the most malleable among the three metals. It can be easily hammered into thin sheets without breaking.

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  • Mar 22, 2023
    Quiz Edited by
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  • Jul 21, 2009
    Quiz Created by
    Ieso2009
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