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Geosciences LibreTexts

7.12: Student Responses

  • Page ID
    5590
  • 1. Sample 1: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    2. Sample 2: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    3. Sample 3: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    4. Sample 4: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    5. Sample 5: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    6. Sample 6: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    7. Sample 7: This sample has:

    a. no cleavage (it fractures)

    b. 1 cleavage plane

    c. 2 cleavage planes at 90°

    d. 3 cleavage planes at 90° 

    e. 4 cleavage planes

     

    8. Sample 8: This sample has:

    a. no cleavage (it fractures)

    b. 1 cleavage plane

    c. 2 cleavage planes not at 90°

    d. 3 cleavage planes not at 90° 

    e. 4 cleavage planes

     

    9. Sample 9: This sample has:

    a. no cleavage (it fractures)

    b. 1 cleavage plane

    c. 2 cleavage planes not at 90°

    d. 3 cleavage planes at 90° 

    e. 4 cleavage planes

     

    10. Sample 10: This sample has:

    a. no cleavage (it fractures)

    b. 1 cleavage plane

    c. 2 cleavage planes not at 90°

    d. 2 cleavage planes at 90° 

    e. 4 cleavage planes

     

    11. Sample 11: This sample has:

    a. no cleavage (it fractures)

    b. 1 cleavage plane

    c. 2 cleavage planes not at 90°

    d. 2 cleavage planes at 90° 

    e. 3 cleavage planes

     

    12. Sample 11: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    13. Sample 12: This sample has:

    a. no cleavage (it fractures)

    b. 1 cleavage plane

    c. 2 cleavage planes not at 90°

    d. 2 cleavage planes at 90° 

    e. 3 cleavage planes

     

    14. Sample 12: What is this sample’s hardness?

    a. harder than glass

    b. softer than glass but harder than nail

    c. softer than nail but harder than copper

    d. softer than copper but harder than a fingernail

    e. softer than a fingernail

     

    15. Sample 13: What is the streak of this sample?

    a. dark gray streak

    b. white streak

    c. reddish brown streak

    d. pale yellow streak

     

    16. Sample 13: What is the luster of this sample?

    a. non-metallic, vitreous

    b. non-metallic, earthy

    c. non-metallic, greasy

    d. non-metallic, waxy e. metallic

     

    17. Sample 14: What is the streak of this sample?

    a. dark gray to black streak

    b. white streak

    c. reddish-brown streak

    d. pale yellow streak

     

    18. Sample 14: Which other item(s) is/are characteristic(s) of this sample?

    a. stains the fingers

    b. harder than glass

    c. greasy feel

    d. both a and b

    e. both a and c

     

    19. Sample 15: What is the streak of this sample?

    a. dark gray to black streak

    b. white streak

    c. reddish-brown streak

    d. pale yellow streak

     

    20. Sample 16: What is the luster of this sample?

    a. non-metallic, vitreous

    b. non-metallic, earthy

    c. non-metallic, greasy

    d. non-metallic, waxy

    e. metallic

     

    21. Sample 16: Due to its appearance, this sample has often been confused with native gold, a mineral with a hardness of 2.5-3. How does its hardness compare with that of gold?

    a. Sample 16 is harder than gold.

    b. Sample 16 is softer than gold.

     

    22. Sample 17: What is the streak of this sample?

    a. dark gray to black streak

    b. white streak

    c. reddish-brown streak

    d. pale yellow streak

     

    23. Sample 17: What another unique property does this sample have?

    a. effervescence in acid

    b. it is magnetic

    c. it tastes salty

    d. it feels soapy

    e. it writes on paper

     

    24. Sample 18. Examine this entire sample closely with a hand lens. What is the luster of this sample?

    a. non-metallic, vitreous

    b. non-metallic, earthy

    c. non-metallic, greasy

    d. non-metallic, waxy

    e. metallic

     

    25. Sample 1: What is this sample?

    a. Microcline

    b. Fluorite

    c. Quartz

    d. Olivine

    e. Talc

    f. Selenite (Gypsum)

     

    26. Sample 2: What is this sample? 

    a. Microcline

    b. Fluorite

    c. Quartz

    d. Olivine

    e. Talc

    f. Selenite (Gypsum)

     

    27. Sample 3: What is this sample?

    a. Microcline

    b. Fluorite

    c. Quartz

    d. Olivine

    e. Talc

    f. Selenite (Gypsum)

     

    28. Sample 4: What is this sample?

    a. Microcline

    b. Fluorite

    c. Quartz

    d. Olivine

    e. Talc

    f. Selenite (Gypsum)

     

    29. Sample 4: What other unique property does this sample have?

    a. effervescence in acid

    b. it is magnetic. 

    c. it tastes salty. 

    d. it feels soapy. 

    e. it writes on paper. 

     

    30. Sample 5: What is this sample?

    a. Microcline

    b. Fluorite

    c. Quartz

    d. Olivine

    e. Talc

    f. Selenite (Gypsum)

     

    31. Sample 6: What is this sample?

    a. Microcline

    b. Fluorite

    c. Quartz

    d. Olivine

    e. Talc

    f. Selenite (Gypsum)

     

    32. Sample 7: What is this sample?

    a. Pyroxene

    b. Muscovite Mica

    c. Halite

    d. Amphibole

    e. Calcite

    f. Biotite Mica

     

    33. Sample 7: What other unique property does this sample have?

    a. effervescence in acid

    b. it is magnetic. 

    c. it tastes salty. 

    d. it feels soapy. 

    e. it writes on paper. 

     

    34. Sample 8: What is this sample?

    a. Pyroxene

    b. Muscovite Mica

    c. Halite

    d. Amphibole

    e. Calcite

    f. Biotite Mica

     

    35. Sample 8: What other unique property does this sample have?

    a. effervescence in acid

    b. it is magnetic. 

    c. it tastes salty. 

    d. it feels soapy. 

    e. it writes on paper. 

     

    36. Sample 9: What is this sample?

    a. Pyroxene

    b. Muscovite Mica

    c. Halite

    d. Amphibole

    e. Calcite

    f. Biotite Mica

     

    37. Sample 10: What is this sample?

    a. Pyroxene

    b. Muscovite Mica

    c. Halite

    d. Amphibole

    e. Calcite

    f. Biotite Mica

     

    38. Sample 10: Test this tenacity of this mineral by trying to bend it. Which way does it behave?

    a. sectile

    b. malleable

    c. elastic

    d. brittle

     

    39. Sample 11: What is this sample?

    a. Pyroxene

    b. Muscovite Mica

    c. Halite

    d. Amphibole

    e. Calcite

    f. Biotite Mica

     

    40. Sample 12: What is this sample?

    a. Pyroxene

    b. Muscovite Mica

    c. Halite

    d. Amphibole

    e. Calcite

    f. Biotite Mica

     

    41. Sample 13: What is this sample?

    a. Magnetite

    b. Graphite

    c. Copper

    d. Sulfur

    e. Hematite

    f. Pyrite

     

    42. Sample 14: What is this sample?

    a. Magnetite

    b. Graphite

    c. Copper

    d. Sulfur

    e. Hematite

    f. Pyrite

     

    43. Sample 15: What is this sample?

    a. Magnetite

    b. Graphite

    c. Copper

    d. Sulfur

    e. Hematite

    f. Pyrite

     

    44. Sample 16: What is this sample?

    a. Magnetite

    b. Graphite

    c. Copper

    d. Sulfur

    e. Hematite

    f. Pyrite

     

    45. Sample 17: What is this sample?

    a. Magnetite

    b. Graphite

    c. Copper

    d. Sulfur

    e. Hematite

    f. Pyrite

     

    46. Sample 18: What is this sample?

    a. Magnetite

    b. Graphite

    c. Copper

    d. Sulfur

    e. Hematite

    f. Pyrite