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70 True/False questions

  1. Which of the following is NOT foliated metamorphic rock?
    A. gneiss
    B. schist
    C. slate
    D. marble
    D. marble

          

  2. The parallel arrangement of large platy minerals is best described as
    A. slaty cleaveage
    B. schistosity
    C. gneissic layering
    D. metasomatism
    E. migmatite
    B. schistosity

          

  3. Which of the following is most likely to have
    a granular texture?
    A. Marble
    B. anthracite
    C. migmatite
    D. Gneiss
    E. A and B
    A. Garnet-mica schist

          

  4. The "layered" or "banded" appearance resulting from mineral alignment in a metamorphic rock is termed:
    A. pseudo-crystallization
    B. Bedding
    C. foliation
    D. orientation
    D. dense

          

  5. Which of the following is NOT the result of metamorphism?
    A. growth of new materials
    B. development of alignment of minerals within the rock body
    C. re-crystallization of minerals
    D. deep weathering of feldspar-rich rocks
    E. conglomerate pebbles deformed into long elliptical shapes
    C. Crystallization

          

  6. Isotopes of the same atom will have different numbers of __________.
    A. protons
    B. ions
    C. electrons
    D. neutrons
    D. neutrons

          

  7. How many protons (p) and neutrons (n) comprise an alpha particle?
    A. 1p, 1n
    B. 3p, 2n
    C. 2p, 2n
    D. 29, 1n
    C. 2p, 2n

          

  8. When stress is applied unequally in different directions, it is termed __________.
    A. confining pressure
    B. confining stress
    C. differential pressure
    D. differential stress
    D. dominant life-forms

          

  9. Which is the subdivision of an epoch?
    A. Era
    B. epoch
    C. eon
    D. period
    E. none
    E. none

          

  10. We are presently living in the __________ era.
    A. Hadean
    B. Paleozoic
    C. Cenozoic
    D. Mesozoic
    D. Epochs

          

  11. The most common chemically active fluid involved in the metamorphic process is hot water containing ions in solution.
    A. True
    B. False
    A. True

          

  12. The spontaneous breaking apart of unstable atomic nuclei is called radioactivity.
    A. True
    B. False
    B. schistosity

          

  13. Exposures of metamorphic rocks are most widespread in:
    A. young mountains
    B. shields
    C. oceanic Islands
    D. plateaus
    E. stable platforms
    B. shields

          

  14. Which of the following metamorphic rocks represents the highest intensity of metamorphism?
    A. slate
    B. quartzite
    C. schist
    D. gneiss
    E. marble
    D. gneiss

          

  15. __________ dates pinpoint the time in history when something took place.
    A. Relative
    B. chronological
    C. numerical
    C. numerical

          

  16. Which one of the following is NOT a type of unconformity?
    A. transitional unconformity
    B. disconformity
    C. nonconformity
    D. angular unconformity
    C. Crystallization

          

  17. The rate of radioactive decay for each unstable radioactive isotope is expressed as its __________.
    A. half-life
    B. degeneration curve
    C. deep span
    D. radioactive term
    A. half-life

          

  18. When a rock is buried it is subjected to greater confining pressure which tends to make the rock more __________.
    A. buoyant
    B. elongated
    C. Fragile
    D. dense
    D. dense

          

  19. Which of the following pairs of parent rock and its metamorphosed equivalent is NOT correctly matched?
    A. sandstone - quartzite
    B. shale - slate
    C. limestone - schist
    D. granite - gneiss
    E. conglomerate - metaconglomerate
    D. deep weathering of feldspar-rich rocks

          

  20. Which one of these metamorphic rocks is composed predominantly of a single mineral?
    A. garnet-mica schist
    B. gneiss
    C. marble
    D. bauxite
    A. Zeolite

          

  21. Which is the smallest time span on the geologic time scale?
    A. Era
    B. epoch
    C. eon
    D. period
    E. none
    B. epoch

          

  22. Mesozoic is an example of ..............
    A. Era
    B. epoch
    C. eon
    D. period
    E. none
    E. none

          

  23. What is the major source of heat for contact metamorphism?
    A. deep burial
    B. Frictional heat created by moving fault
    C. Heat from the decomposition of minerals
    D. Heat from a nearby magma body
    D. deep weathering of feldspar-rich rocks

          

  24. Cambrian and Jurassic are examples of
    A. Era
    B. epoch
    C. eon
    D. period
    E. none
    D. period

          

  25. Each era is divided into smaller units called __________, which may be further divided into __________.
    A. stages; period
    B. epochs; ages
    C. ages; stages
    D. periods; epochs
    A. half-life

          

  26. During metamorphism, elongated crystals tend to recrystallize with an orientation that is ________ to the direction of greatest stress.
    A. parallel
    B. perpendicular
    C. directed
    D. none of the above
    C. complete melting of the material from which it formed

          

  27. When a beta particle is emitted from the nucleus of an atom:
    A. neutron becomes a proton
    B. an electron changes to a neutron
    C. a proton changes to a neutron
    D. a proton changes to a neutron
    E. All of the above

          

  28. Which of the following metamorphic rocks is formed under very low pressure and low temperature?
    A. Zeolite
    B. Blueschist
    C. Greenschist
    D. Granulite
    E. Sanidinite
    D. Blueschist facies

          

  29. Increased pressure on rocks during metamorphism may result in:
    A. rocks becoming plastic in behavior
    B. changes in rock texture & mineralogy
    C. re-orientation of mineral grains
    D. closer atomic packing and compression, elongation or rotation of mineral grains
    E. All of the above
    D. lineation

          

  30. Which one of the following is not an agent of metamorphism?
    A. Pressure (stress)
    B. heat
    C. Crystallization
    D. Chemically active fluid
    C. Crystallization

          

  31. Rocks subjected to intense heat when they are intruded by magma undergo a process called
    A. tectonic metamorphism
    B. searing
    C. contact metamorphism
    D. Thermal modification
    C. contact metamorphism

          

  32. Which of these rocks is not a metamorphic rock?
    A. slate
    B. marble
    C. sandstone
    D. quartzite
    E. gneiss
    C. sandstone

          

  33. Breaks or gaps in the rock record in which strata on both sides of the unconformity are parallel is:
    A. a disconformity
    B. a nonconformity
    C. an angular unconformity
    D. a conformity
    C. complete melting of the material from which it formed

          

  34. In the geologic time scale, era names represent important differences in __________.
    A. continental uplift
    B. mountain building episodes
    C. volcanic events
    D. dominant life-forms
    C. eons

          

  35. The age of the Earth is about
    A. 4.5 million yrs
    B. 540 million yrs
    C. 4.5 billion yrs
    D. 12.6 billion yrs
    C. 4.5 billion yrs

          

  36. Which era of the Phanerozoic eon has the most Periods?
    A. Mesozoic
    B. Paleozoic
    C. Cenozoic
    D. all have the same number
    D. Gneiss

          

  37. Which of the following metamorphic rocks has a porphyroblastic texture?
    A. Garnet-mica schist
    B. Slate
    C. Gneiss
    D. Quartzite
    E. Mylonite
    A. Garnet-mica schist

          

  38. Marble is metamorphosed from which of the following rocks?
    A. Shale
    B. Quartz sandstone
    C. Granite
    D. Limestone
    E. Siltstone
    A. True

          

  39. Which of the following rocks does not belong to the group?
    A. Gneiss
    B. Granite
    C. Slate
    D. Marble
    E. Hornfels
    B. Granite

          

  40. The number of _________ in an atom gives the atom its atomic number.
    A. protons
    B. electrons
    C. positions
    D. neutrons
    D. neutrons

          

  41. The percentage of radioactive atoms that decay during each half-life is always fifty percent; however the actual number of atoms that decay continually decreases.
    A. True
    B. False
    A. True

          

  42. The Phanerozoic era began about ... years ago
    A. 4.5 billion yrs
    B. 2.5 billion years
    C. 540 million yrs
    D. 248 million years
    C. 540 million yrs

          

  43. Atoms which have the same atomic numbers, but different mass numbers, are referred to as __________.
    A. ions
    B. catalysts
    C. isotopes
    D. variants
    C. Crystallization

          

  44. The number of protons plus neutrons in an atom's nucleus is the atom's __________ number.
    A. mass
    B. isotope
    C. key
    D. atomic
    A. mass

          

  45. After the third half-life, the fraction of the original radioactive atoms remaining will be __________.
    A. one-half
    B. one-fourth
    C. one-eighth
    D. one-sixteenth
    C. one-eighth

          

  46. Which of the following can cause metamorphism?
    A. chemical action of fluids
    B. increases in pressure
    C. increases in temperature
    D. all of the above
    D. all of the above

          

  47. The texture exhibited by slate, schist, and gneiss is called
    A. fracture
    B. stratification.
    C. cleavage
    D. foliation
    E. alignment
    D. foliation

          

  48. The Hadean, Archean, and Proterozoic are:
    A. Eons that collectively comprise Precambrian
    B. epochs of the quaternary Period
    C. eras of the Phanerozoic eon
    D. Periods of the Paleozoic era
    D. Precambrian

          

  49. The parallel re-alignment of rod-like minerals during metamorphism is:
    A. slaty cleavage
    B. schistocity
    C. banding
    D. lineation
    E. foliation
    D. lineation

          

  50. Which of the following is NOT an accurate statement about metamorphic rocks?
    A. The original rocks have been intensely altered.
    B. Grains commonly have a preferred orientation.
    C. They constitute a large part of the continental crust.
    D. They are commonly strongly stratified.
    A. chlorite

          

  51. __________ dating is the task of placing rock units and geologic events in their proper sequence.
    A. Numerical
    B. Relative
    C. Sequence
    D. Radioactive
    C. numerical

          

  52. Formation of metamorphic rock NEVER involves which of the following?
    A. formation of new minerals from old
    B. increase in density
    C. complete melting of the material from which it formed
    D. change in orientation of mineral from which it formed
    E. change in shape of mineral grains
    C. complete melting of the material from which it formed

          

  53. What type of unconformity consists of folded sedimentary rocks overlain by younger, more flat-lying strata?
    A. nonconformity
    B. reversed conformity
    C. disconformity
    D. angular unconformity
    D. angular unconformity

          

  54. The only metamorphic rock in this list is:
    A. sandstone
    B. basalt
    C. slate
    D. shale
    E. rhyolite
    C. sandstone

          

  55. Which of the following index minerals indicates lowest grade metamorphism?
    A. chlorite
    B. biotite
    C. garnet
    D. staurolite
    E. sillimanite
    D. deep weathering of feldspar-rich rocks

          

  56. Metamorphic rocks can form from other metamorphic rocks.
    A. True
    B. False
    A. True

          

  57. Eons are divided into one of these:
    A. Era
    B. epoch
    C. eon
    D. period
    E. none
    A. Era

          

  58. No place on Earth has a complete set of conformable strata.
    A. True
    B. False
    A. True

          

  59. Which one of the following is NOT a type of radioactive decay?
    A. alpha capture
    B. beta emission
    C. neutron capture
    D. electron capture
    C. Crystallization

          

  60. Which of the following presents the eras of the Phanerozoic eon in the correct order, from most recent to oldest?
    A. Mesozoic, Cenozoic, Paleozoic
    B. Cenozoic, Paleozoic, Mesozoic
    C. Paleozoic, Mesozoic, Cenozoic
    D. Cenozoic, Mesozoic, Paleozoic
    D. deep weathering of feldspar-rich rocks

          

  61. Collectively, the Hadean, Archean, and Proterozoic eons are often referred to as the __________.
    A. Paleozoic
    B. Mesozoic
    C. Pleistocene
    D. Precambrian
    A. Eons that collectively comprise Precambrian

          

  62. Which of the following is a non-foliated metamorphic rock?
    A. Slate
    B. Garnet-mica schist
    C. Gneiss
    D. Quartzite
    D. Gneiss

          

  63. Nonfoliated metamorphic rocks are usually composed of __________.
    A. elongated mineral graind
    B. equidimensional mineral grains
    C. a mixture of elongated and equidimensional mineral grains
    D. None of the above
    B. equidimensional mineral grains

          

  64. With each type of radioactive decay, the atomic number of the radioactive atom changes.
    A. True
    B. False
    A. half-life

          

  65. When we observe strata that are inclined at a steep angle, we can conclude that they were tilted sometime after their deposition by applying this relative dating principle.
    A. superposition
    B. cross-cutting
    C. inclusion
    D. original horizontality
    D. original horizontality

          

  66. Which one of the following is a foliated metamorphic rock?
    A. quartzite
    B. anthracite coal
    C. Granite
    D. Gneiss
    D. Gneiss

          

  67. On the geologic time scale, __________ represent the greatest expanses of time.
    A. epochs
    B. eras
    C. eons
    D. periods
    E. none of the above
    C. eons

          

  68. Metamorphism
    A. occurs during the deep burial of rock bodies
    B. occurs around igneous intrusion
    C. develops from strong directed horizontal stresses
    D. commonly produces foliation that is not parallel with the original bedding of the rock being metamorphosed
    E. all of the above
    E. all of the above

          

  69. Which of the following metamorphic rocks is most likely to be formed at the oceanic trench where an oceanic crust is being subducted underneath another plate
    A. Greenscist facies
    B. Granulite facies
    C. Eclogite facies
    D. Blueschist facies
    E. Sanidinite
    D. Blueschist facies

          

  70. Eocene, Pleistocene, and Holocene are examples of
    A. eons
    B. Periods
    C. Eras
    D. Epochs
    D. Epochs