Geology Test One

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cait.smith96
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15891
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Geology Test One
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2010-04-24 00:32:00
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geology dehon
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Answers from Geology test questions
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  1. Fool's Gold (Pyrite), like gold, is soft and malleable. T or F
    False
  2. The earth is uniform is composition (all the same stuff) from the center to the surface. T or F
    False
  3. The minerals in igneous rocks all crystallize out of the melt at the same time and temperature. T or F
    False
  4. Minerals are always crystalline solids. T or F
    True
  5. Basalt is the most common intrusive igneous rock. T or F
    False
  6. The "discontinuous series" of Bowen's Reaction Series consists of dark colored minerals. T or F
    True
  7. Rubies and sapphires are composed of exactly the same chemicals. T or F
    True
  8. Present day geologic process are very different than those of the distant past. T or F
    False
  9. The texture of igneous rocks is determined by the cooling rate of the magma. T or F
    True
  10. There are more oxygen atoms in the crust of the earth than in the atmosphere. T or F
    True
  11. The ocean crust is formed mostly of -
    A. Granite
    B. Quartz-rick Rock
    C. Basalt
    D. Sedimentary Rock
    C. Basalt
    (this multiple choice question has been scrambled)
  12. Rubies and sapphires are gem quality varieties of -
    A. Quartz
    B. Feldspar
    C. Corundum
    D. Topaz
    C. Corundum
    (this multiple choice question has been scrambled)
  13. The earth's core is inferred to be -
    A. very cold
    B. mostly iron
    C. hollow
    D. silica-rich
    B. mostly iron
    (this multiple choice question has been scrambled)
  14. The premise that present-day processes have operated throughout geologic time is know as the principle of -
    A. plate tectonics
    B. modernism
    C. catastrophism
    D. uniformitarianism
    D. uniformitarianism
    (this multiple choice question has been scrambled)
  15. Ocean-ocean convergence zones are marked by the occurrence of -
    A. folded, collision mountains
    B. mid-oceanic ridges
    C. continental volcanic
    D. volcanic island arcs
    D. volcanic island arcs
    (this multiple choice question has been scrambled)
  16. Dark minerals in igneous rocks are -
    A. iron oxides
    B. the last minerals to form
    C. iron-magnesium silicates
    D. aluminum-rich minerals
    C. iron-magnesium silicates
    (this multiple choice question has been scrambled)
  17. Continental crust -
    A. is formed at mid-oceanic rift zones
    B. sinks and is consumed at subduction zones
    C. is composed mostly of basalt
    D. is compressed and thickened at converging plate margins
    D. is compressed and thickened at converging plate margins
    (this multiple choice question has been scrambled)
  18. The steps to the library are made of
    A. marble
    B. calcite
    C. granite
    D. concrete
    C. granite
    (this multiple choice question has been scrambled)
  19. The mid-oceanic ridges are sites of -
    A. granite formation
    B. explosive volcanism
    C. compressive stresses
    D. sea floor spreading
    D. sea floor spreading
    (this multiple choice question has been scrambled)
  20. ____ is a rock composed of olivine and pyroxene that similar to the composition of the mantle.
    A. anorthosite
    B. feldspar
    C. gabbro
    D. perodotite
    D. perodotite
    (this multiple choice question has been scrambled)
  21. Calcite is composed of -
    A. silicon dioxide
    B. potassium prochlorate
    C. calcium carbonate
    D. magnesium oxide
    C. calcium carbonate
    (this multiple choice question has been scrambled)
  22. Thin, sheet-like, disconcordant igneous intrusions are -
    A. laccoliths
    B. dikes
    C. stocks
    D. sills
    B. dikes
    (this multiple choice question has been scrambled)
  23. The tendency for some minerals to break along smooth, flat surfaces is known as -
    A. fracture
    B. crystallinity
    C. streak
    D. cleavage
    D. cleavage
    (this multiple choice question has been scrambled)
  24. The earth is estimated to be ___ years old?
    A. 4.6 billion
    B. 460 million
    C. 6 thousand
    D. 4.6 million
    A. 4.6 billion
    (this multiple choice question has been scrambled)
  25. The most abundant mineral group in the crust is -
    A. pyroxene
    B. amphibole
    C. mica
    D. feldspar
    D. feldspar
    (this multiple choice question has been scrambled)
  26. Rapid cooling of magma results in a fine-grained texture called -
    A. pornographic
    B. aphanitic
    C. porphyritic
    D. phaneritic
    D. phaneritic
    (this multiple choice question has been scrambled)
  27. Igneous rocks that have a ___ texture have grains that can be seen with the named or unaided eye.
    A. porphyritic
    B. pornographic
    C. phaneritic
    D. aphanitic
    C. phaneritic
    (this multiple choice question has been scrambled)
  28. A natural glass formed by rapid cooling of lava is called -
    A. tuff
    B. obsidian
    C. quartz
    D. phyolite
    B. obsidian
    (this multiple choice question has been scrambled)
  29. Basalt has the same mineral and chemical composition as -
    A. granite
    B. gabbro
    C. rhyolite
    D. diorite
    B. gabbro
    (this multiple choice question has been scrambled)
  30. The mineral assemblage of quartz, K-spar, Na-plagioclase, with minor biotite or hornblende would be recognized readily by you as the minerals found in the rock know as -
    A. gabbro
    B. granite
    C. scoria
    D. diorite
    B. granite
    (this multiple choice question has been scrambled)
  31. The dark, rock-forming minerals are rich in -
    A. Ca and Na
    B. Ca and Mg
    C. Al and Si
    D. Fe and Mg
    D. Fe and Mg
    (this multiple choice question has been scrambled)
  32. The early-formed light-colored mineral in a melt [magma[ is -
    A. olivine
    B. quartz
    C. plagioclase
    D. k-spar
    A. olivine
    (this multiple choice question has been scrambled)
  33. Pyroclastic rocks form by -
    A. two periods of cooling
    B. a magma cooling in the subsurface
    C. lava cooling at the surface
    D. violent, explosive volcanic eruptions
    D. violent, explosive volcanic eruptions
    (this multiple choice question has been scrambled)
  34. Phenocrysts are evidence of -
    A. two periods of cooling
    B. explosive eruptions
    C. rapid cooling
    D. rapid loss of gas from the magma
    A. two periods of cooling
    (this multiple choice question has been scrambled)
  35. Vesicles (holes) form in igneous rock (such as scoria and vesicular basalt) fro m-
    A. two periods of cooling
    B. abundant silica
    C. escaping gas
    D. fast cooling
    C. escaping gas
    (this multiple choice question has been scrambled)
  36. The common lava extruded from stratovolcanoes is -
    A. andesite
    B. stradalitite
    C. basalt
    D. rhyolite
    A. andesite
    (this multiple choice question has been scrambled)
  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. fluid basaltic lava
    (this multiple choice question has been scrambled)
  38. Steep-sided, classic, "volcano-shaped" cones are called -
    A. stratovolcanoes
    B. collapsed caldera
    C. shield cones
    D. maars
    A. stratovolcanoes
    (this multiple choice question has been scrambled)
  39. Mt. St. Helens is an excellent example of a -
    A. cinder cone
    B. shield cone
    C. explosive caldera
    D. lava dome
    C. explosive caldera
    (this multiple choice question has been scrambled)
  40. Rugged, blocky lava flows are called -
    A. pahoehoe
    B. Aa
    C. pillow lavas
    D. welded tuffs
    B. Aa
    (this multiple choice question has been scrambled)
  41. A volcanic rock that floats is -
    A. pumice
    B. obsidian
    C. tuff
    D. scoria
    A. pumice
    (this multiple choice question has been scrambled)
  42. Which one of the follow minerals can you scratch with your finger nail?
    A. gypsum
    B. sphalerite
    C. fluorite
    D. calcite
    A. gypsum
    (this multiple choice question has been scrambled)
  43. An igneous rock possessing a combination of mineral grains with markedly different grain sizes is -
    A. formed by explosive volcanism
    B. never found in nature
    C. natural glass
    D. a porphyry
    D. porphyry
    (this multiple choice question has been scrambled)
  44. My. Fuji in Japan and Mt. Etna on Sicily are classic examples of -
    A. shield cones
    B. stratovolcanoes
    C. batholiths
    D. collapse caldera
    B. stratavolcanoes
    (this multiple choice question has been scrambled)
  45. The mid-oceanic ridges are -
    A. subduction of oceanic material
    B. sites of new oceanic material
    C. old oceanic material
    D. birthing place of new continents
    B. sites of new oceanic material
    (this multiple choice question has been scrambled)
  46. All plate margins are characterized by -
    A. high earthquake activity
    B. abundant volcanoes
    C. great, high mountains
    D. rift zones
    A. high earthquake activity
    (this multiple choice question has been scrambled)
  47. Mid-oceanic ridges are sites of ____ plate boundaries
    A. transform
    B. convergent
    C. porcelan
    D. divergent
    D. divergent
    (this multiple choice question has been scrambled)
  48. Rocks composed on only pyroxene and olivine may form by-
    A. stoping
    B. pyrolivity
    C. crystal floating
    D. crystal settling
    D. crystal settling
    (this multiple choice question has been scrambled)
  49. Which one of the following groups do most minerals in the earth's crust belong?
    A. carbonates
    B. oxides
    C. silicates
    D. sulfates
    C. silicates
    (this multiple choice question has been scrambled)
  50. Most granite forms by -
    A. melting mantle rocks
    B. volcanism in island arcs
    C. melting oceanic crust in subduction zone
    D. melting of lower continental crustal material
    D. melting of lower continental crustal material
    (this multiple choice question has been scrambled)
  51. Enchanted rock is
    A. a recently erupted volcano
    B. an exposed portion of granite batholiths
    C. the home of fairies
    D. a laccolith
    B. an exposed portion of granite batholiths
    (this multiple choice question has been scrambled)
  52. Dikes and sills are probably empaled in the crust by -
    A. burying lava flows
    B. melting of rocks in place
    C. injection of magma into fractures
    D. leakage from the core of the earth
    C. injection of magma into fractures
    (this multiple choice question has been scrambled)
  53. The first minerals of crystallize out of magma are -
    A. Ca-plagioclase and olivine
    B. quartz and k-spar
    C. pyroxene and olivine
    D. Na-plagioclase and olivine
    A. Ca-plagioclase and olivine
    (this multiple choice question has been scrambled)
  54. ___ is composed of minerals found in the mid-range of Bowen's Reaction series.
    A. anorthosite
    B. rhyolite
    C. diorite
    D. granite
    E. gabbro
    C. diorite
    (this multiple choice question has been scrambled)
  55. The minerals in the rock diorite are -
    A. augite, hornblende, and plagioclase
    B. olivine, k-spar, and quartz
    C. quartz, feldspar, muscovite
    D. olivine and pyroxene
    A. augite, hornblende and plagioclase
    (this multiple choice question has been scrambled)
  56. The minerals in igneous rocks that is rich in aluminum are -
    A. calcite and augite
    B. olivine and pyroxene
    C. quartz and pyrite
    D. mica and feldspar
    D. mica and feldspar
    (this multiple choice question has been scrambled)
  57. The rock cycle implies that-
    A. any rock type can form from any other rock type
    B. igneous rocks form only from metamorphic rocks
    C. sedimentary rocks form only from weathering of igneous rocks
    D. once formed, a rock remains unaltered forever and ever
    A. any rock type can form from any other rock type
    (this multiple choice question has been scrambled)
  58. The bright regions of the moon are made up of the rock -
    A. anorthosite
    B. basalt
    C. granite
    D. calite
    A. anorthosite
    (this multiple choice question has been scrambled)
  59. Forty percent of the near side of the moon consists of smooth, dark plains made up of-
    A. lake deposits
    B. andesite
    C. feldspar
    D. basalt
    D. basalt
    (this multiple choice question has been scrambled)
  60. If you had to find K-spar where it occurs naturally in the state of Texas, one place that you would be certain to find it is -
    A. Enchanted Rock
    B. Canyon lake
    C. lab
    D. the library
    A. Enchanted Rock
    (this multiple choice question has been scrambled)
  61. Plagioclase
    A. glass, clear or translucent grains
    B. white or grey, box-shaped grains
    C. dark brown sheets
    D. dark, brown to black grains with 60 degree and 120 degree cleavage
    E. glassy, green grains
    B. white or grey, box-shaped grains
    (this multiple choice question has been scrambled)
  62. Amphibole (hornblende) -
    A. dark brown sheets
    B. dark, brown to black grains with 60 degree and 120 degree cleavage
    C. glass, clear or translucent grains
    D. glassy, green grains
    E. white or grey, box-shaped grains
    B. dark, brown to black grains....
    (this multiple choice question has been scrambled)
  63. Olivine
    A. glassy, green grains
    B. white or grey, box-shaped grains
    C. glass, clear or translucent grains
    D. dark brown sheets
    E. dark, brown to black grains with 60 degree and 120 degree cleavage
    A. glassy, green grains
    (this multiple choice question has been scrambled)
  64. Quartz -
    A. dark, brown to black grains with 60 degree and 120 degree cleavage
    B. dark brown sheets
    C. white or grey, box-shaped grains
    D. glass, clear or translucent grains
    E. glassy, green grains
    D. glass, clear or translucent grains
    (this multiple choice question has been scrambled)
  65. Biotite (mica)
    A. white or grey, box-shaped grains
    B. glassy, green grains
    C. glass, clear or translucent grains
    D. dark brown sheets
    E. dark, brown to black grains with 60 degree and 120 degree cleavage
    D. dark brown sheets
    (this multiple choice question has been scrambled)

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