Deck 8: The Dynamic Planet
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Deck 8: The Dynamic Planet
1
Earth's magnetic field
A) is variable, and it has phased to zero some nine times during the past 4 million years.
B) is constant in its intensity.
C) remains a mystery as to its cause.
D) is principally generated in the inner core.
A) is variable, and it has phased to zero some nine times during the past 4 million years.
B) is constant in its intensity.
C) remains a mystery as to its cause.
D) is principally generated in the inner core.
A
2
The shape of Earth's surface results from
A) gravity.
B) the action of wind, water and ice.
C) the radioactive decay of atoms.
D) all of the above
E) gravity, wind, water, and ice only
A) gravity.
B) the action of wind, water and ice.
C) the radioactive decay of atoms.
D) all of the above
E) gravity, wind, water, and ice only
D
3
Which of the following lists is in the correct sequence from youngest to oldest?
A) Holocene, Pleistocene, Pliocene, Miocene
B) Holocene, Precambrian, Cenozoic
C) Paleozoic, Cenozoic, Mesozoic
D) Tertiary, Quaternary, Cretaceous
A) Holocene, Pleistocene, Pliocene, Miocene
B) Holocene, Precambrian, Cenozoic
C) Paleozoic, Cenozoic, Mesozoic
D) Tertiary, Quaternary, Cretaceous
A
4
When geologists or archaeologists dig downward into a unit of rock or sediment, they are digging "back in time." This fact is based on the principle of ________.
A) uniformitarianism
B) superposition
C) catastrophism
A) uniformitarianism
B) superposition
C) catastrophism
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5
Knowledge of Earth's interior is derived from
A) direct sampling of the interior using deep-test wells.
B) work in Earth's deepest caverns and caves.
C) indirect evidence involving the analysis of seismic waves.
D) historic and prehistoric records.
A) direct sampling of the interior using deep-test wells.
B) work in Earth's deepest caverns and caves.
C) indirect evidence involving the analysis of seismic waves.
D) historic and prehistoric records.
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6
Which of the following statements about Earth's core is false?
A) It is composed primarily of iron.
B) The inner core is believed to be liquid and the outer core solid.
C) Temperatures in the core reach several thousand degrees.
D) Temperatures and pressures are higher in the inner core than in the outer core.
A) It is composed primarily of iron.
B) The inner core is believed to be liquid and the outer core solid.
C) Temperatures in the core reach several thousand degrees.
D) Temperatures and pressures are higher in the inner core than in the outer core.
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7
Earth's interior is
A) evenly mixed throughout.
B) not subject to internal differentiation.
C) heated unevenly by the heat of radioactive decay.
D) arranged with lighter elements toward the center and heavier elements toward the crust.
A) evenly mixed throughout.
B) not subject to internal differentiation.
C) heated unevenly by the heat of radioactive decay.
D) arranged with lighter elements toward the center and heavier elements toward the crust.
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8
Which of the following is incorrectly matched?
A) endogenic - internal processes
B) exogenic - external processes
C) radioactive decay heat - exogenic energy source
D) weathering - exogenic breaking and dissolving the crust
A) endogenic - internal processes
B) exogenic - external processes
C) radioactive decay heat - exogenic energy source
D) weathering - exogenic breaking and dissolving the crust
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9
Tectonic forces
A) erode the surface of Earth.
B) warp, fold, and uplift rock.
C) control soil formation processes.
D) form sedimentary rock.
A) erode the surface of Earth.
B) warp, fold, and uplift rock.
C) control soil formation processes.
D) form sedimentary rock.
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10
Approximately 90 percent of Earth's magnetic field is generated in the
A) inner core.
B) outer core.
C) lower mantle.
D) upper mantle.
A) inner core.
B) outer core.
C) lower mantle.
D) upper mantle.
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11
The heat that melted the early Earth was derived from
A) nuclear fusion.
B) radioactive decay.
C) chemical reactions.
D) sunlight.
A) nuclear fusion.
B) radioactive decay.
C) chemical reactions.
D) sunlight.
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12
The idea that Earth formed only a few thousand years ago is
A) basically accepted today by science.
B) based on little physical evidence and is more appropriately considered a belief.
C) referred to as uniformitarianism.
D) the basis of the geologic time scale.
A) basically accepted today by science.
B) based on little physical evidence and is more appropriately considered a belief.
C) referred to as uniformitarianism.
D) the basis of the geologic time scale.
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13
Which of the following is true regarding the geologic time scale?
A) The bulk of Earth's history has occurred during the Cenozoic era.
B) Over 87 percent of Earth's history has elapsed during the more recent Cenozoic, Mesozoic, and Paleozoic eras.
C) Both relative and absolute dating methods are used in determining the sequence of the time scale.
D) We live in the Tertiary period.
A) The bulk of Earth's history has occurred during the Cenozoic era.
B) Over 87 percent of Earth's history has elapsed during the more recent Cenozoic, Mesozoic, and Paleozoic eras.
C) Both relative and absolute dating methods are used in determining the sequence of the time scale.
D) We live in the Tertiary period.
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14
Which of the following is in nature?
A) earthquakes
B) volcanism
C) flows of heat and materials in the mantle
D) weathering
A) earthquakes
B) volcanism
C) flows of heat and materials in the mantle
D) weathering
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15
Which of the following can occur when seismic waves encounter a layer in Earth's interior?
A) They can be reflected or refracted.
B) They can be absorbed.
C) Their speed can change.
D) All of the above can occur, depending upon the nature of the layer.
E) None of the above-seismic waves cannot penetrate below the crust of Earth.
A) They can be reflected or refracted.
B) They can be absorbed.
C) Their speed can change.
D) All of the above can occur, depending upon the nature of the layer.
E) None of the above-seismic waves cannot penetrate below the crust of Earth.
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16
Uniformitarianism assumes that
A) Earth is quite young and is shaped by dramatic events.
B) catastrophic episodes have regularly occurred.
C) the same physical processes we see today are a key to understanding the processes that have been operating throughout geologic time.
D) mountains, plains, and canyons formed by catastrophic events.
A) Earth is quite young and is shaped by dramatic events.
B) catastrophic episodes have regularly occurred.
C) the same physical processes we see today are a key to understanding the processes that have been operating throughout geologic time.
D) mountains, plains, and canyons formed by catastrophic events.
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17
Which of the following is in nature?
A) weathering
B) stream deposition
C) volcanism
D) glacial erosion
A) weathering
B) stream deposition
C) volcanism
D) glacial erosion
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18
Which of the following gives the correct sequence of layers in Earth, from the surface to the center?
A) crust, core, lower mantle, aesthenosphere
B) aesthenosphere, lower mantle, crust, core
C) crust, lower mantle, aesthenosphere, core
D) crust, aesthenosphere, lower mantle, core
A) crust, core, lower mantle, aesthenosphere
B) aesthenosphere, lower mantle, crust, core
C) crust, lower mantle, aesthenosphere, core
D) crust, aesthenosphere, lower mantle, core
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19
Which of the following lists the correct sequence of divisions in the geologic time scale, from largest to smallest?
A) era, eon, epoch, period
B) eon, era, period, epoch
C) epoch, era, eon, period
D) period, eon, era, epoch
A) era, eon, epoch, period
B) eon, era, period, epoch
C) epoch, era, eon, period
D) period, eon, era, epoch
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20
Which of the following is an example of an age-relationship based on relative dating?
A) The oldest known rocks on Earth are 3.96 billion years old.
B) The Vishnu schist at the bottom of the Grand Canyon is 2 billion years old.
C) The dinosaurs became extinct 65 million years ago.
D) The Coconino formation in the Grand Canyon is older than the Kaibab formation.
A) The oldest known rocks on Earth are 3.96 billion years old.
B) The Vishnu schist at the bottom of the Grand Canyon is 2 billion years old.
C) The dinosaurs became extinct 65 million years ago.
D) The Coconino formation in the Grand Canyon is older than the Kaibab formation.
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21
The transition zone from the outer core to the mantle is ________ and is known as the ________ discontinuity.
A) uneven; Gutenberg
B) uneven; Moho
C) smooth; Gutenberg
D) smooth; Moho
A) uneven; Gutenberg
B) uneven; Moho
C) smooth; Gutenberg
D) smooth; Moho
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22
Continental crust is basically ________, whereas oceanic crust is basically ________.
A) thin; thick
B) basalt; granite
C) granite; basalt
D) sima; sial
A) thin; thick
B) basalt; granite
C) granite; basalt
D) sima; sial
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23
Which layer of the planet forms 80 percent of Earth's total volume, and has an average density of 4.5 grams per cm²?
A) continental crust
B) oceanic crust
C) mantle
D) core
A) continental crust
B) oceanic crust
C) mantle
D) core
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24
What percent of Earth's crust is composed of only eight natural elements?
A) 25
B) 50
C) 75
D) 99
A) 25
B) 50
C) 75
D) 99
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25
The principles of buoyancy and balance, when applied to Earth's crust, helps us to explain fluctuations in Earth's outer crust, a property known as
A) magnetism.
B) Moho effect.
C) isostasy.
D) orogenesis.
A) magnetism.
B) Moho effect.
C) isostasy.
D) orogenesis.
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26
Glaciers that once covered the Hudson Bay area melted 8,000 years ago. As a result of this, the bay is gradually rising. In another 10,000 years or so, it will have risen above sea level and become dry. This process can best be considered an example of
A) catastrophism.
B) isostasy.
C) accretion.
D) orogenesis.
A) catastrophism.
B) isostasy.
C) accretion.
D) orogenesis.
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27
The boundary between the crust and the rest of the lithospheric upper mantle is a discontinuity known as the
A) Gutenberg.
B) mantle.
C) Moho.
D) lithospheric layer.
A) Gutenberg.
B) mantle.
C) Moho.
D) lithospheric layer.
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28
An element or combination of elements that forms an inorganic, natural compound is called a
A) tectonic rock.
B) granitic compound.
C) mineral.
D) molecule.
A) tectonic rock.
B) granitic compound.
C) mineral.
D) molecule.
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29
Which of the following gives the correct sequence of layers in the mantle, from center to surface?
A) lower mantle; upper mantle, aesthenosphere
B) aesthenosphere, mantle, upper mantle
C) upper mantle, aesthenosphere, mantle
D) mantle, aesthenosphere, upper mantle
A) lower mantle; upper mantle, aesthenosphere
B) aesthenosphere, mantle, upper mantle
C) upper mantle, aesthenosphere, mantle
D) mantle, aesthenosphere, upper mantle
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30
Which of the following is not part of the hydrologic cycle?
A) transportation
B) erosion
C) sedimentation
D) radioactive decay
A) transportation
B) erosion
C) sedimentation
D) radioactive decay
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31
With depth, the mantle becomes ________ due to greater ________.
A) more plastic; pressures
B) more plastic; temperatures
C) stiffer; pressures
D) stiffer; temperatures
A) more plastic; pressures
B) more plastic; temperatures
C) stiffer; pressures
D) stiffer; temperatures
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32
The three most abundant elements in Earth's crust are
A) rock, water, and tectonics.
B) magnesium, potassium, and oxygen.
C) iron, aluminum, and granite.
D) oxygen, silicon, and aluminum.
A) rock, water, and tectonics.
B) magnesium, potassium, and oxygen.
C) iron, aluminum, and granite.
D) oxygen, silicon, and aluminum.
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33
Heat energy and new materials are brought to the surface from the interior by the
A) tectonic cycle.
B) rock cycle.
C) hydrologic cycle.
D) mineral cycle.
A) tectonic cycle.
B) rock cycle.
C) hydrologic cycle.
D) mineral cycle.
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34
The majority of Earth's crust is composed of ________ rock.
A) igneous
B) metamorphic
C) sedimentary
D) carbonate
A) igneous
B) metamorphic
C) sedimentary
D) carbonate
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35
Which of the following is true of the aesthenosphere?
A) It contains pockets of increased heat.
B) It flows.
C) It carries the crustal plates.
D) All of these are true.
E) None of these are true.
A) It contains pockets of increased heat.
B) It flows.
C) It carries the crustal plates.
D) All of these are true.
E) None of these are true.
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36
The aesthenosphere can best be described as
A) a rigid solid.
B) a liquid.
C) plastic-like.
D) plasma-like.
A) a rigid solid.
B) a liquid.
C) plastic-like.
D) plasma-like.
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37
The density of material the Moho is ________ that above it.
A) greater than
B) less than
C) the same as
A) greater than
B) less than
C) the same as
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38
Three types of rock-forming processes compose the
A) tectonic cycle.
B) rock cycle.
C) hydrologic cycle.
D) mineral cycle.
A) tectonic cycle.
B) rock cycle.
C) hydrologic cycle.
D) mineral cycle.
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39
The thickness of Earth's crust ranges from
A) 5 km to 60 km (3 mi to 37 mi).
B) 70 km to 250 km (43 mi to 155 mi).
C) the surface to an unknown depth.
D) the surface down to 2900 km (1800 mi).
A) 5 km to 60 km (3 mi to 37 mi).
B) 70 km to 250 km (43 mi to 155 mi).
C) the surface to an unknown depth.
D) the surface down to 2900 km (1800 mi).
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40
Which of the following is false regarding Earth's magnetic field?
A) It causes magnetic particles in cooling magma to align with magnetic field lines.
B) Transition periods, during which reversals occur, last an average of about 4000 to 8000 years.
C) Earth's magnetic field will probably reverse in the next few thousand years.
D) A given field orientation can last billions of years.
A) It causes magnetic particles in cooling magma to align with magnetic field lines.
B) Transition periods, during which reversals occur, last an average of about 4000 to 8000 years.
C) Earth's magnetic field will probably reverse in the next few thousand years.
D) A given field orientation can last billions of years.
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41
Which of the following is matched correctly?
A) granite - metamorphic
B) basalt - sedimentary
C) magma - lava
D) sandstone - igneous
A) granite - metamorphic
B) basalt - sedimentary
C) magma - lava
D) sandstone - igneous
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42
The Sierra Nevada mountain range in California is an example of
A) an extrusive igneous formation.
B) a lava flow.
C) an exposed batholith.
D) a volcano.
A) an extrusive igneous formation.
B) a lava flow.
C) an exposed batholith.
D) a volcano.
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43
A laccolith is actually a large version of a ________.
A) dike
B) discontinuity
C) sill
D) batholith
A) dike
B) discontinuity
C) sill
D) batholith
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44
Mafic minerals are ________ minerals.
A) dark colored, high density
B) dark colored, low density
C) light colored, high density
D) light colored, low density
A) dark colored, high density
B) dark colored, low density
C) light colored, high density
D) light colored, low density
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45
Coal is a fossil fuel formed from
A) dead marine organisms.
B) plants.
C) metamorphosed mafic minerals.
D) blue-green algae.
A) dead marine organisms.
B) plants.
C) metamorphosed mafic minerals.
D) blue-green algae.
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46
An assemblage of minerals bound together is called a
A) granitic compound.
B) mineral.
C) molecule.
D) rock.
A) granitic compound.
B) mineral.
C) molecule.
D) rock.
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47
Salt is an example of ________ rock.
A) sedimentary
B) extrusive igneous
C) metamorphic
D) intrusive igneous
A) sedimentary
B) extrusive igneous
C) metamorphic
D) intrusive igneous
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48
The history of life on Earth is chronicled in which type of rock?
A) igneous
B) metamorphic
C) sedimentary
A) igneous
B) metamorphic
C) sedimentary
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49
Limestone is an example of which type of rock-forming process?
A) sedimentary
B) metamorphic
C) igneous
A) sedimentary
B) metamorphic
C) igneous
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50
The presence of 180-million-year-old salt domes in the Gulf Coast region of the U.S. indicates that
A) the area was once volcanically active.
B) the area was subjected to plate collisions, which caused metamorphism to occur.
C) subsidence is now occurring due to the withdrawal of magma from the region.
D) a sea used to cover the area but subsequently evaporated.
E) None of these are indicated.
A) the area was once volcanically active.
B) the area was subjected to plate collisions, which caused metamorphism to occur.
C) subsidence is now occurring due to the withdrawal of magma from the region.
D) a sea used to cover the area but subsequently evaporated.
E) None of these are indicated.
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51
The size of sediment transported from an area and subsequently deposited is a function of
A) the energy of the transporting agent.
B) the relief of the area.
C) the energy of the environment.
D) all of these
E) none of these
A) the energy of the transporting agent.
B) the relief of the area.
C) the energy of the environment.
D) all of these
E) none of these
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52
The major rocks of Earth's crust are classified into principal types based on
A) element composition.
B) mineral composition.
C) three specific rock-forming processes, i.e., the manner in which they formed.
D) relative and absolute locations.
A) element composition.
B) mineral composition.
C) three specific rock-forming processes, i.e., the manner in which they formed.
D) relative and absolute locations.
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53
If you were driving down the highway and saw mountains composed of layered strata, you could be confident that you were looking at
A) sedimentary rocks.
B) extrusive igneous rock.
C) a shield volcano.
D) batholiths or laccoliths.
A) sedimentary rocks.
B) extrusive igneous rock.
C) a shield volcano.
D) batholiths or laccoliths.
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54
A batholith forms from
A) intrusive igneous rock.
B) extrusive igneous rock.
C) metamorphic rock.
D) sediment accumulation in a depression.
A) intrusive igneous rock.
B) extrusive igneous rock.
C) metamorphic rock.
D) sediment accumulation in a depression.
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55
A rock made of clay particles is most likely to have formed in which of the following environments?
A) beach
B) desert
C) swamp
A) beach
B) desert
C) swamp
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56
Consider a beach environment with large, powerful waves breaking along the shore. Given the nature of this environment, which of the following sediments would be least likely to be deposited there?
A) gravel and sand
B) sand
C) silt and clay
A) gravel and sand
B) sand
C) silt and clay
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57
The mineral crystals in a sill would be ________ those in a lava flow.
A) larger than
B) smaller than
C) the same size as
A) larger than
B) smaller than
C) the same size as
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58
Which of the following is a sedimentary rock?
A) sandstone
B) bituminous coal
C) marble
D) shale
A) sandstone
B) bituminous coal
C) marble
D) shale
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59
A rock transformed from any other rock through profound physical and/or chemical processes is referred to as
A) sedimentary.
B) metamorphic.
C) igneous.
D) ancient.
A) sedimentary.
B) metamorphic.
C) igneous.
D) ancient.
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60
Which of the following is an example of an intrusive, igneous rock?
A) volcano
B) pluton
C) dome
D) lava flow
A) volcano
B) pluton
C) dome
D) lava flow
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61
The magma that fuels and produces the volcanic activity around the Pacific Ring of Fire is derived from the
A) magma extruded from rift zones that are developing along the Pacific Rim.
B) rise of material that was melted in subduction zones along the Pacific margins.
C) rise of magma from hot spots, such as those that formed the Hawaiian Islands.
D) rise of magma along transform faults.
A) magma extruded from rift zones that are developing along the Pacific Rim.
B) rise of material that was melted in subduction zones along the Pacific margins.
C) rise of magma from hot spots, such as those that formed the Hawaiian Islands.
D) rise of magma along transform faults.
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62
Convergent plate boundaries are characteristic of
A) sea-floor spreading centers.
B) collision zones between plates.
C) lateral motions of plates.
D) all plate boundaries.
A) sea-floor spreading centers.
B) collision zones between plates.
C) lateral motions of plates.
D) all plate boundaries.
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63
Several large, linear lakes are forming in East Africa. This is evidence of what process?
A) rifting
B) subduction
C) compression
D) isostatic uplift
A) rifting
B) subduction
C) compression
D) isostatic uplift
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64
The ancient roots of mountains are usually composed of ________ rocks.
A) sedimentary
B) metamorphic
C) igneous
A) sedimentary
B) metamorphic
C) igneous
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65
Which of the following is false regarding geothermal energy?
A) It could be used everywhere.
B) It's in use in Iceland, Japan, and California.
C) Loss of aquifer pressure and groundwater drawdown can reduce production over time.
D) It can be used to produce both heat and electricity.
A) It could be used everywhere.
B) It's in use in Iceland, Japan, and California.
C) Loss of aquifer pressure and groundwater drawdown can reduce production over time.
D) It can be used to produce both heat and electricity.
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66
Which of the following is the fuel for continental drift and plate tectonics?
A) nuclear fusion
B) radioactive decay
C) solar energy
D) chemical reactions in Earth's core
A) nuclear fusion
B) radioactive decay
C) solar energy
D) chemical reactions in Earth's core
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67
The Hawaiian Islands were formed as a result of
A) a rising plume of magma from the mantle.
B) an oceanic-oceanic plate collision.
C) a continental-oceanic plate collision.
D) activity along a midocean ridge.
A) a rising plume of magma from the mantle.
B) an oceanic-oceanic plate collision.
C) a continental-oceanic plate collision.
D) activity along a midocean ridge.
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68
The ocean floor is a maximum of about 200 million years in age because
A) Earth is only 200 million years old.
B) the ocean floor is pushed up onto continental material during plate collisions.
C) the ocean floor subducts during plate collisions.
D) hot spots continuously destroy the ocean floor.
E) None of the above-the ocean floor is 3.96 billion years old.
A) Earth is only 200 million years old.
B) the ocean floor is pushed up onto continental material during plate collisions.
C) the ocean floor subducts during plate collisions.
D) hot spots continuously destroy the ocean floor.
E) None of the above-the ocean floor is 3.96 billion years old.
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69
Which of the following is true of divergent plate boundaries?
A) Rifting occurs there.
B) Tensional forces exist there.
C) New ocean crust can be created there.
D) all of these
E) none of these
A) Rifting occurs there.
B) Tensional forces exist there.
C) New ocean crust can be created there.
D) all of these
E) none of these
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70
An unmetamorphosed dike could be composed of which of the following?
A) granite
B) sandstone
C) obsidian
D) gneiss
A) granite
B) sandstone
C) obsidian
D) gneiss
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71
Marble is a familiar example of which type of rock?
A) intrusive igneous
B) metamorphic
C) sedimentary
D) extrusive igneous
A) intrusive igneous
B) metamorphic
C) sedimentary
D) extrusive igneous
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72
Which of the following supports the continental drift concept?
A) magnetic field patterns preserved in the rocks
B) plant and animal fossil records
C) radioactive decay dating of rocks on either side of a spreading center
D) All of these support the theory.
E) None of these is valid evidence of continental drift.
A) magnetic field patterns preserved in the rocks
B) plant and animal fossil records
C) radioactive decay dating of rocks on either side of a spreading center
D) All of these support the theory.
E) None of these is valid evidence of continental drift.
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73
layers of quartzite exposed in a mountain range indicate that
A) the mountain was covered with water.
B) sand was deposited on a steeply sloping surface, lithified, uplifted and then exposed at the surface.
C) sand was deposited, lithified, metamorphosed, uplifted and exposed.
D) limestone was deposited, lithified, metamorphosed, uplifted and exposed.
A) the mountain was covered with water.
B) sand was deposited on a steeply sloping surface, lithified, uplifted and then exposed at the surface.
C) sand was deposited, lithified, metamorphosed, uplifted and exposed.
D) limestone was deposited, lithified, metamorphosed, uplifted and exposed.
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74
The ocean floor subducts under continents because
A) the ocean floor has a lower density and therefore sinks more easily.
B) the ocean floor is made of felsic minerals and is heavier than continental material.
C) the ocean floor is made of mafic material and is therefore more dense than continental material.
D) the weight of the continents is so great that they push the ocean floor material downward.
E) both A and B
A) the ocean floor has a lower density and therefore sinks more easily.
B) the ocean floor is made of felsic minerals and is heavier than continental material.
C) the ocean floor is made of mafic material and is therefore more dense than continental material.
D) the weight of the continents is so great that they push the ocean floor material downward.
E) both A and B
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75
At which of the following locations is new ocean crust being formed?
A) rift zones
B) along collision zones between two continents
C) along collision zones between two oceanic plates
D) in trenches
A) rift zones
B) along collision zones between two continents
C) along collision zones between two oceanic plates
D) in trenches
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76
Which of the following are located along the midocean ridges?
A) volcanoes
B) outcrops of granite
C) old oceanic sediments
D) evaporite deposits
A) volcanoes
B) outcrops of granite
C) old oceanic sediments
D) evaporite deposits
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77
Plate boundaries are associated with
A) earthquakes.
B) volcanoes.
C) subduction.
D) rifting.
E) all of the above
A) earthquakes.
B) volcanoes.
C) subduction.
D) rifting.
E) all of the above
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78
Which of the following is false relative to hot spots?
A) Hot spots can occur beneath both oceanic and continental crust.
B) They remain relatively fixed in relationship to the migrating plates.
C) They are responsible for the formation of the Hawaiian-Emperor Islands chain.
D) Hot spot activity is unrelated to the formation of Iceland, which sits atop a sea-floor spreading ridge in the North Atlantic.
A) Hot spots can occur beneath both oceanic and continental crust.
B) They remain relatively fixed in relationship to the migrating plates.
C) They are responsible for the formation of the Hawaiian-Emperor Islands chain.
D) Hot spot activity is unrelated to the formation of Iceland, which sits atop a sea-floor spreading ridge in the North Atlantic.
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79
Which of the following is false regarding the metamorphism process?
A) It can be accomplished by heat.
B) It can be accomplished by pressure.
C) It involves melting of the original rock.
D) It can be accomplished by chemical processes.
A) It can be accomplished by heat.
B) It can be accomplished by pressure.
C) It involves melting of the original rock.
D) It can be accomplished by chemical processes.
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80
At which of the following locations does subduction occur?
A) along collision zones between two continents
B) at sea floor spreading zones
C) above mantle hot spots
D) along collision zones between continental and oceanic plates
A) along collision zones between two continents
B) at sea floor spreading zones
C) above mantle hot spots
D) along collision zones between continental and oceanic plates
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