Test 1 Dehon

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Test 1 Dehon
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2010-05-06 21:59:44
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Test 1
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  1. . Fool’s Gold (Pyrite), like gold, is soft and
    malleable.
    F
  2. The
    earth is uniform in composition (all the same stuff) from the center to the
    surface.
    F
  3. The
    minerals in igneous rocks all crystallize out of the melt at the same time and temperature
    F
  4. Minerals
    are always crystalline solids.
    T
  5. Basalt
    is the most common intrusive igneous rock
    f
  6. The
    “discontinuous series” of Bowen’ Reaction Series consists of dark colored
    minerals.
    t
  7. Rubies
    and sapphires are composed of exactly the same chemical(s).
    t
  8. Present
    day geologic processes are very different than those of the distant past
    f
  9. The
    texture of igneous rocks is determined by the cooling rate of the magma
    t
  10. There
    are more oxygen atoms in the crust of the earth than in the atmosphere.
    t
  11. ocean crust is formed mostly of —

    a. granite b. sedimentary rock c. quartz-rich rock d. basalt
    d
  12. Rubies and sapphires are gem quality
    varieties of--

    a.
    quartz b. feldspar c. corundum d. topaz
    c
  13. earth’s core is inferred to be--


    a.
    hollow b. silica-rich c. mostly iron d.
    very cold
    c
  14. The premise that present-day processes
    have operated throughout geologic time is known as the principle of-

    a.
    plate tectonics b. modernism c. catastrophism d. uniformitarianism
    d
  15. Ocean-ocean convergence zones are
    marked by the occurrence of–


    a.
    mid-oceanic ridges b.
    continental volcanic arcs

    c.
    folded, collision mountains d. volcanic island arcs
    d
  16. Dark minerals in igneous rocks are –

    a. iron-magnesium silicates b. iron oxides

    c.
    aluminum-rich minerals d. the last minerals to form
    a
  17. Continental crust –

    a.
    sinks and is consumed at subduction zones

    b.
    is composed mostlly of basalt

    c.
    is formed at mid-oceanic rift zones

    d. is compressed and thickened
    at converging plate margins
    d
  18. The steps to the library are made of
    __________.


    a. granite b. concrete c. calcite d.
    marble
    a
  19. The mid-oceanic ridges are sites of–


    a.
    explosive volcanism b. granite formation

    c. sea floor spreading d. compressive stresses
    c
  20. is a rock composed of olivine and
    pyroxene that similar to the composition of
    the mantle.

    a. anorthosite b. gabbro c.
    feldspar d. perodotite
    d
  21. Calcite is composed of--

    a. calcium carbonate b. potassium prochlorate

    c.
    magnesium oxide d. silicon dioxide
    a
  22. Thin, sheet-like, disconcordant igneous
    intrusions are;


    a. dikes b. laccoliths


    c.
    stocks d. sills
    a
  23. The tendency for some minerals to break
    along smooth, flat surfaces is known as--


    a.
    fracture b.
    streak

    c.
    crystallinity d. cleavage
    d
  24. The earth is estimated to be _____years
    old?


    a.
    6 thousand b. 4.6 million


    c.
    460 million d. 4.6 billion
    d
  25. most abundant mineral group in the
    crust is --

    a. feldspar b.
    amphibole c. mica d. pyroxene
    a
  26. cooling of magma results in a
    fine-grained texture called--


    a.
    phaneritic b. aphanitic c. porphyritic d. sacroidal
    b
  27. Igneous rocks that have a _______
    texture have grains that can be seen with the (excuse the expression) naked or
    unaided eye.


    a. phaneritic b.
    aphanitic


    c. porphyritic d.
    pornographic
    a
  28. A natural glass formed by rapid cooling
    of lava is called --

    a.
    rhyolite b. quartz c. tuff d. obsidian
    d
  29. Basalt has the same mineral and
    chemical composition as--

    a. rhyolite b. granite c. diorite d. gabbro
    d
  30. The mineral assemblage of quartz,
    K-feldspar, Na-plagioclase, with minor biotite or hornblende would be
    recognized readily by you as the minerals found in the rock known as--

    a. granite b.
    diorite c. gabbro d. scoria
    a
  31. dark, rock-forming minerals are rich in—

    a. Fe and Mg
    b. Ca and Mg c. Ca and Na d. Al and Si
    a
  32. The early-formed light-colored mineral
    in a melt [magma] is--

    a.
    olivine b. K-feldspar c. plagioclase d.
    quartz
    c
  33. Pyroclastic rocks form by--

    a.
    lava cooling at the surface

    b. violent, explosive volcanic
    eruptions

    c.
    a magma cooling in the subsurface

    d.
    two periods of cooling
    b
  34. Phenocrysts are evidence of--


    a.
    rapid cooling b.
    explosive eruptions


    c. two periods of cooling d. rapid loss of gas from the
    magma
    c
  35. Vesicles (holes) form in igneous rock
    (such as scoria and vesicular basalt) from--


    a. escaping gas b. two periods
    of cooling


    c.
    fast cooling d.
    abundant silica
    a
  36. The common lava extruded from
    stratovolcanoes is–


    a. rhyolite b.
    stradalitite c. basalt d. andesite
    d
  37. Shield volcanoes have low, angle slopes
    because they are composed of--

    a.
    pyroclastic layers b. fluid basaltic lava

    c.
    viscous rhyolites d. pillow lavas
    b
  38. Steep-sided, classic, “volcano-shaped”
    cones are called--

    a. shield cones b. stratovolcanoes
    b
  39. Mt. St. Helens is an excellent example
    of a--

    a. explosive caldera b.
    cinder cone c. shield cone
    d. lava dome
    a
  40. Rugged, blocky lava flows are called--

    a.
    pahoehoe b. Aa c. pillow lavas d. welded tuffs
    b
  41. A volcanic rock that floats is--


    a.
    scoria b.
    pumice c. obsidian d.
    tuff
    b
  42. .
    Which one of the following minerals can scratch with your finger nail?

    a.
    calcite b. fluorite c. gypsum d. sphalerite
    c
  43. .
    An igneous rock possessing a combination of mineral grains with markedly
    different grain sizes is--


    a.
    a natural glass b. formed by
    explosive volcanism


    c. a porphyry d.
    never found in nature
    c
  44. Mt. Fuji (Fujiyama) in Japan and Mt.
    Etna on Sicily are classic examples of--


    a.
    batholiths b. stratovolcanoes

    c.
    collapse caldera d. shield
    cones
    b
  45. The mid-oceanic ridges are –


    a. sites of new oceanic material b. old oceanic material


    c.
    subduction of oceanic material d.
    birthing place of new continents
    a
  46. All plate margins are characterized by–


    a. high earthquake activity b. abundant volcanoes

    c.
    rift zones d.
    great, high mountains
    a
  47. Mid-oceanic ridges are sites of ______
    plate boundaries.


    a. divergent b. convergent c. transform d. porcelan
    a
  48. Rocks
    composed on only pyroxene and olivine may form by—

    a. crystal settling b. crystal floating c. stoping d.
    pyrolivity
    a
  49. Which one of the following groups do
    most minerals in the earth’s crust belong?

    a.
    oxides b. sulfates c. carbonates d.
    silicates
    d
  50. Which one of the following groups do
    most minerals in the earth’s crust belong?

    a.
    oxides b. sulfates c. carbonates d.
    silicates
    d
  51. Enchanted rock is—


    a.
    the home of fairies b.
    a recently erupted volcano


    c. an exposed portion of a
    granite batholiths d. a laccolith
    c
  52. Dikes and sills are probably emplaced
    in the crust by—


    a. injection of magma into
    fractures b. melting of rocks in place


    c.
    burying lava flows d. leakage from the core of the earth
    a
  53. The first minerals of crystallize out
    of a magma are –


    a. Ca-Plagioclase and olivine b. Na-plagioclase and olivine


    c.
    Pyroxene and olivine d.
    quartz and K-feldspar
    a
  54. .
    __________ is composed of minerals found in the mid-range of Bowen’s
    Reaction series.


    a.
    granite b. rhyolite c. gabbro d. diorite e. anorthosite
    d
  55. The minerals in the the rock identified
    in question 54 are ______________.


    a.
    quartz, feldspar, and muscovite b.
    olivine and pyroxene


    c. augite, hornblende and
    plagioclase d. olivine,
    K-feldspar, and quartz
    c
  56. The minerals in igneous rocks that is
    rich in aluminum are_____________.


    a.
    olivine and pyroxene b. calcite and
    augite


    c.
    quartz and pyrite d. mica and feldspar
    d
  57. The rock cycle is implies that--

    a.
    igneous rocks form only from metamorphic rocks

    b.
    sedimentary rocks form only from weathering of igneous rocks

    c. any rock type can form from
    any other rock type


    d.
    once formed, a rock remains unaltered forever and ever (amen)
    c
  58. The bright regions of the moon are made
    up of the rock ________.


    a.
    basalt b. anorthosite c. granite d.
    calite
    b
  59. Forty percent of the near side of the
    moon consists of smooth, dark plains made up of –

    a. basalt b. andesite c. lake deposits d. feldspar
    a
  60. If you had to find K-feldspar where it
    occurs naturally in
    the state of Texas, one place that


    you
    would be certain to find it is—


    a.
    the library b. Enchanted Rock c. lab d. Canyon Lake
    b
  61. Plagioclase
    (feldspar)

    a.
    dark brown sheets

    c.
    glassy, clear or translucent grains

    . white
    or grey, box-shaped grains

    d.
    glassy, green grains

    e.
    dark, brown to black grains with 60º
    and 120º cleavage

    b
    b
  62. Amphibole
    (hornblende)

    a.
    dark brown sheets

    c.
    glassy, clear or translucent grains

    . white
    or grey, box-shaped grains

    d.
    glassy, green grains

    e.
    dark, brown to black grains with 60º
    and 120º cleavage

    b
    e
  63. Olivine

    a.
    dark brown sheets

    b. white
    or grey, box-shaped grains

    e.
    dark, brown to black grains with 60º
    and 120º cleavage

    c.
    glassy, clear or translucent grains

    d.
    glassy, green grains
    d
  64. Quartz

    a.
    dark brown sheets

    b. white
    or grey, box-shaped grains

    e.
    dark, brown to black grains with 60º
    and 120º cleavage

    c.
    glassy, clear or translucent grains

    d.
    glassy, green grains
    c
  65. Biotite (mica)

    a.
    dark brown sheets

    b. white
    or grey, box-shaped grains

    e.
    dark, brown to black grains with 60º
    and 120º cleavage

    c.
    glassy, clear or translucent grains

    d.
    glassy, green grains
    a

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