Geology 101 - Introduction to Geology » Spring 2022 » Midterm 3

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Question #1
Which type of plate boundaries is most directly associated with Earth's major mountain belts?
A.   transform boundary
B.   divergent boundary and transform boundary
C.   convergent boundary
D.   convergent boundary and transform boundary
E.   divergent boundary
Question #2
In oceanic-continental convergence, a volcanic arc is created on the ________ and is the result of ________ rising up from a subducting plate.
A.   continental plate; sediment
B.   continental plate; magma
C.   oceanic plate; magma
D.   oceanic plate; sediment
Question #3
California's Great Central Valley is an example of ____.
A.   an accretionary wedge
B.   a forearc basin
C.   a trench
D.   a batholith
E.   a continental volcanic arc
Question #4
In what ways are the Sierra Nevada Mountains and the Andes Mountains the same in terms of mountain formation?
A.   Emplacement of batholiths
B.   Extension of the continent through rifting
C.   Crumpling of the continent through collision with another continent
D.   Downwarping of the continent due to crustal subsidence
Question #5
How can the existence of fossil marine life in rocks atop collisional mountains be explained by plate tectonics?
A.   The rocks at the top of these mountains that contain fossils are oceanic terranes, which are blocks of rock that used to be various parts of oceanic crust. Oceanic blocks of rock were tectonically moved toward the oceanic trench, colliding with the crustal rocks because they were too large to subduct due to the fact that they contained fossils.
B.   The rocks at the top of these mountains that contain fossils are oceanic terrains, which are blocks of rock that used to be various parts of oceanic crust. Thicker oceanic blocks of rock were tectonically moved toward the oceanic trench, colliding with the crustal rocks because they were too large to subduct.
C.   During orogenesis, less dense oceanic crust containing marine fossils crumples up with denser continental crust during convergence. The lower density of the oceanic crust places marine fossils near the tops of the resulting mountains
D.   The rocks at the top of these mountains that contain fossils are oceanic terranes, which are blocks of rock that used to be various parts of oceanic crust. Thicker oceanic blocks of rock were tectonically moved toward the oceanic trench, colliding with the crustal rocks because they were too large to subduct.
E.   When two plates collide at their continental margins, their deformable seaward rock containing marine organisms crumples up to the top of the resulting mountains.
Question #6
At which of the following sites is the Earth's crust recycled back into the Mantle?
A.   Subduction Zone
B.   Hot Spot
C.   Mid-oceanic ridge
D.   Convergent continental-continental plate bouundary
Question #7
Which of the following mountain ranges are no longer actively forming?
A.   Himalayas
B.   Andes
C.   Appalachians
D.   Mid-Atlantic Ridge
Question #8
Which of the following types of mountains form when the lithosphere is stretched and thinned?
A.   Alpine-type mountains
B.   Andean-type mountains
C.   Island arc-type mountains
D.   Fault-block mountains
Question #9
A downward isostatic adjustment is called _________and an upward isostatic adjustment is called __________
A.   subsidence; uplift
B.   uplift; subduction
C.   uplift; subsidence
D.   subduction; uplift
Question #10
Which of the following is the underlying reason for mass wasting?
A.   gravity
B.   plate tectonics
C.   water
D.   glaciers
Question #11
Which of the following areas are more prone to mass wasting?
A.   old, broad mountain
B.   the great plains
C.   densely vegetated land
D.   steep slopes
Question #12
Which of the following can trigger a landslide?
A.   adding water to sediments
B.   planting vegetation
C.   drought
D.   removal of water from sediments
Question #13
While the Earth's internal processes such as _________ may elevate surfaces, external forces such as ___________work to break rocks apart and move debris to lower elevations
A.   volcanic activity; mass movement
B.   plate tectonics; plate tectonics
C.   mass movement; erosion
D.   mass movement; plate tectonics
Question #14
What is permafrost?
A.   saturated soil that moves downhill very slowly
B.   the layer of soil that thaws to a depth of one meter during summer and refreezes during the winter
C.   permanently frozen ground of tundra and subarctic climates that has remained 0°C for two years or more
D.   soil that episodically moves downslope over time from repeated episodes of freezing and thawing
Question #15
More of Earth’s freshwater is stored in this reservoir than anywhere else on the planet.
A.   rivers
B.   lakes
C.   glaciers
D.   groundwater
Question #16
Which of the following can occur from disturbing permafrost?
A.   it completely melts and creates a lake where the ice used to be
B.   ice within the permafrost may melt, causing the ground to slide, slump, or subside.
C.   it can crack in several places, creating crevices and collapsing into sinkholes
D.   it completely melts and undersaturates the soil beneath it.
Question #17
Gravity is responsible for moving water from the continents into the ocean basins. What mechanism involves water coming back onto the continents?
A.   runoff
B.   transpiration
C.   groundwater
D.   clouds and precipitation
Question #18
Which of the following is the primary step that allows water to enter the groundwater system?
A.   runoff
B.   evaporation
C.   infiltration
D.   precipitation
Question #19
About what percentage of Earth's water is in the form of seawater?
A.   1
B.   10
C.   50
D.   97
Question #20
What is the name of an area in which all water falling in it flows out through one location?
A.   Stream
B.   Watershed
C.   Divide
D.   Tributary
Question #21
The ________ is an imaginary line that divides an entire continent into large drainage basins.
A.   Continental Divide
B.   Mississippi River
C.   Sediment production zone
D.   Appalachian Mountains
Question #22
Which of the following occurs to a river when it reaches the ocean?
A.   The river speeds up and more sediments deposit from it
B.   The river speeds up and less sediments deposit from it
C.   The river slows down and less sediments deposit from it
D.   The river slows down and more sediments deposit from it
Question #23
The bottom limit to stream erosion (the ultimate base level) is_______
A.   sea level
B.   dam level
C.   lake level
D.   a canyon
Question #24
Ground that is impermeable to water (i.e., asphalt, concrete, and nonporous rock) favors ______________ floods because it allows surface water to rise rapidly, and ground that is made of porous, unconsolidated sediments (i.e., some soils) favors ___________ floods.
A.   flash; regional
B.   flash; ice-jam
C.   regional; flash
D.   regional; ice-jam
Question #25
In the zone of saturation, groundwater __________________
A.   evaporates
B.   has chemically reacted with the surrounding rock
C.   does not exist
D.   has completely filled the pore spaces
Question #26
The water table is located_________________
A.   below the unsaturated zone
B.   below the saturated zone
C.   above the Earth's surface
D.   above the zone of soil moisture
Question #27
The flow pattern of groundwater is determined by____________
A.   salinity
B.   gravity
C.   plate tectonics
D.   erosion
Question #28
More than half of the U.S. freshwater is provided by groundwater.
A.   TRUE
B.   FALSE
Question #29
Which of the following answers explains the difference between porosity and permeability?
A.   Permeability is highly concerned with the volume of open space within a rock, whereas porosity is not.
B.   Porosity is highly concerned with the connectedness of pore spaces, whereas permeability is not.
C.   Permeability is expressed as a percentage, whereas porosity is not.
D.   Permeability is the percentage of the total volume of rock or sediment that consists of pore spaces, whereas porosity is the ability of a rock or sediment to transmit fluid.
E.   Porosity is the percentage of the total volume of rock or sediment that consists of pore spaces, whereas permeability is the ability of a rock or sediment to transmit fluid.
Question #30
Which of the following is a requirement for a successful well?
A.   be drilled into the unsaturated zone
B.   be drilled through an aquitard
C.   penetrate well below the regional water table surface
D.   be drilled into a perched aquifer
Question #31
What is the source of heat for most hot springs and geysers?
A.   the climate
B.   friction
C.   the sun
D.   magma and igneous rocks
Question #32
During the formation of sinkholes, limestone _____________ due to the______________ of rainwater.
A.   precipitates; alkalinity
B.   dissolves; acidity
C.   dissolves; alkalinity
D.   precipitates; acidity
Question #33
During the last glacial maximum, the position of sea level occurred at what elevation relative to its position today?
A.   At the last glacial maximum, sea level was about 1000 meters (~3000 feet) lower than it is today.
B.   At the last glacial maximum, sea level was about 25 meters (~75 feet) lower than it is today.
C.   At the last glacial maximum, sea level was about 50 meters (~150 feet) lower than it is today.
D.   At the last glacial maximum, sea level was about 10 meters (~30 feet) lower than it is today.
E.   At the last glacial maximum, sea level was about 100 meters (~300 feet) lower than it is today.
Question #34
Which of the following is true about glaciers?
A.   They can form from frozen seawater
B.   They are required for crystallization of magma to occur
C.   They contribute to erosion
D.   Upon melting, they create oceans
Question #35
Which of the following contains continental ice sheets?
A.   Canada
B.   The Arctic Ocean
C.   Greenland
D.   Iceland
Question #36
Which way does ice flow in a glacier retreating uphill?
A.   Ice does not flow in a glacier.
B.   upslope
C.   downslope
D.   both upslope and downslope
Question #37
Currently, most glaciers worldwide are_____________
A.   advancing
B.   retreating
C.   stagnant
Question #38
What shape of valleys do glaciers typically carve out?
A.   Y
B.   U
C.   V
D.   W
Question #39
For how long has Antarctica been covered by glaciers?
A.   600 million years
B.   since the origin of the Earth 4.5 billion years ago
C.   30 million years
D.   since the last glacial maximum
Question #40
Which of the following can influence whether the Earth is in a glacial or interglacial era?
A.   All answer choices
B.   Plate tectonics and the movement of continents on the Earth
C.   Changes in the atmopsheric carbon dioxide levels
D.   Variations in the Earth's orbit around the sun
Question #41
Which of the following statements about deserts is true?
A.   Deserts are always located in hot, humid coastal areas.
B.   Deserts are defined by their sand content.
C.   Deserts are located where there are ascending air masses and low atmospheric pressure.
D.   Although rainfalls are infrequent, erosion and deposition related to water are more important than wind in deserts.
Question #42
________ weathering is most common in a desert environment.
A.   Dissolution
B.   Erosional
C.   Mechanical
D.   Chemical
Question #43
Why is wind erosion relatively more important in dry regions than in humid areas?
A.   Humid areas experience significantly less wind than dry regions.
B.   The sediment in humid regions is consistently gravel-sized or larger, which is difficult or impossible for wind to move.
C.   Vegetation in humid areas anchors the soil, which inhibits wind erosion.
D.   Humid areas are only underlain by lithified bedrock and never have any loose sediment that wind can transport.

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