GEOGRAPHY EXAM 4 PRACTICE EXAM FRM BOOK
ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW.
GEOGRAPHY EXAM 4 PRACTICE EXAM FRM BOOK ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW.
The volcanoes that comprise the Hawaiian Islands are...
CORRECT ANS: Shield volcanoes
Expert Rationale
The Hawaiian Islands are a classic and extensively studied example of shield volcanoes.
Shield volcanoes are characterized by their broad, gently sloping, shield-like shape,
which is constructed almost entirely of fluid basaltic lava flows. These eruptions are
effusive, meaning they involve the relatively quiet outpouring of lava rather than
explosive eruptions. The low viscosity of the basaltic magma allows it to travel great
distances from the vent, building a wide, flat structure over time. The Hawaiian hotspot,
a mantle plume that has been active for millions of years, generates these volcanoes as
the Pacific Plate moves over it, creating a chain of islands. The gentle slopes and the
predominance of basalt are the defining characteristics that distinguish shield volcanoes
from other types, such as composite (stratovolcanoes) or cinder cones.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Landforms
MSC: NCLEX: N/A
Shield volcanoes...
CORRECT ANS: are associated with effusive eruptions, basalt lava, very hot
temperature
Expert Rationale
,Shield volcanoes are formed by effusive eruptions, which are characterized by the non-
explosive, steady flow of lava onto the surface. The lava that builds these volcanoes is
primarily basalt, which is a mafic rock with a low silica content. This low silica content
results in a very low viscosity, meaning the lava is very fluid and flows easily. Because the
lava is so fluid, it can travel long distances from the eruption site before cooling and
solidifying. The magma source for shield volcanoes is typically very hot, originating from
deep within the mantle (such as a hotspot). The high temperature of the magma is
another reason for its low viscosity. This combination of high temperature, low silica
content, and effusive eruption style is what creates the characteristic broad, gentle
slopes of shield volcanoes.
DIF: Cognitive Level: Understand (Comprehension) TOP: Volcanic Types and Eruptions
MSC: NCLEX: N/A
______ are mudflows due to rapid melting of snow packs along the sides of snow-
covered mountains.
CORRECT ANS: Lahars
Expert Rationale
Lahars are a specific type of volcanic hazard that consist of a destructive mudflow or
debris flow composed of a mixture of water, volcanic ash, rock fragments, and other
debris. The term is Indonesian in origin, reflecting the prevalence of this hazard in the
volcanically active archipelago. While lahars can be triggered by heavy rainfall on loose
volcanic material, they are often associated with the rapid melting of snow and ice (snow
packs) on the upper slopes of a snow-capped volcano. The intense heat from volcanic
activity, such as a lava flow or eruption, can quickly melt large volumes of snow and ice,
generating a torrent of water that mixes with loose volcanic sediment, creating a fast-
moving, highly destructive mudflow. Lahars can travel many miles down river valleys,
inundating communities and infrastructure long after the immediate volcanic eruption
has ceased.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Hazards
MSC: NCLEX: N/A
,Devil's Tower is a...
CORRECT ANS: Volcanic Neck
Expert Rationale
Devil's Tower in Wyoming is a prominent example of a volcanic neck, also known as a
volcanic plug. A volcanic neck is formed when magma hardens within the vent of an
active volcano. The surrounding rock, which is typically softer and more susceptible to
erosion, is gradually worn away by wind and water over millions of years, leaving behind
the more resistant igneous rock that once plugged the volcanic conduit. Devil's Tower is
particularly famous for its distinctive columnar jointing, which is caused by the cooling
and contraction of the volcanic rock. The exposed neck stands in stark contrast to the
surrounding landscape, which has been eroded away, making it a dramatic and
recognizable landform.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Landforms
MSC: NCLEX: N/A
A lava that has a glistening, ropy-like appearance associated with effusive eruptions is
known as...
CORRECT ANS: Pahoehoe
Expert Rationale
Pahoehoe is a Hawaiian term used to describe a type of basaltic lava with a smooth,
billowy, or ropy surface. This distinctive texture forms when highly fluid basaltic lava
flows out slowly and continuously. The surface of the flow cools and solidifies into a thin
crust, but the lava beneath continues to move, causing the crust to wrinkle and fold,
creating the characteristic ropy or coiled appearance. Pahoehoe flows are typically
associated with effusive eruptions of low-viscosity lava, where the lava is not breaking
up as it moves. It is a primary indicator of the lava's fluidity and the style of eruption,
contrasting with the more jagged and blocky A'a lava, which is formed by the same
composition but under different cooling and flow conditions.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Features
MSC: NCLEX: N/A
, The Columbia River Plateau was built from
CORRECT ANS: Basalt
Expert Rationale
The Columbia River Plateau, a large igneous province covering parts of Washington,
Oregon, and Idaho, was formed by massive outpourings of basaltic lava. These eruptions
occurred over a period of millions of years, primarily during the Miocene epoch, and
represent one of the largest flood basalt events on Earth. The lava erupted from fissures,
or long cracks in the Earth's surface, rather than from central volcanoes. The low
viscosity of the basaltic lava allowed it to spread across the landscape, building up
extensive, flat-lying layers of rock. The Columbia River Basalt Group, as it is known, is
composed of numerous individual flows that together cover an area of over 200,000
square kilometers, making it a classic example of a continental flood basalt province.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Landforms
MSC: NCLEX: N/A
Meander
CORRECT ANS: Curve, sharp turn or twist in river
Expert Rationale
A meander is a pronounced curve, bend, or loop in the course of a river. These features
are a fundamental characteristic of river systems, particularly in their lower reaches
where the gradient is low and the river has developed a mature, sinuous channel.
Meanders form as a result of the river's natural tendency to flow in a sinuous path. The
process involves erosion on the outer bank of the bend (where the water flows faster
and has more energy) and deposition on the inner bank (where the water flows slower).
Over time, these processes cause the meander to become more pronounced and to
migrate laterally across the floodplain. A classic example of a river with well-developed
meanders is the Cuyahoga River in Ohio.
ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW.
GEOGRAPHY EXAM 4 PRACTICE EXAM FRM BOOK ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW.
The volcanoes that comprise the Hawaiian Islands are...
CORRECT ANS: Shield volcanoes
Expert Rationale
The Hawaiian Islands are a classic and extensively studied example of shield volcanoes.
Shield volcanoes are characterized by their broad, gently sloping, shield-like shape,
which is constructed almost entirely of fluid basaltic lava flows. These eruptions are
effusive, meaning they involve the relatively quiet outpouring of lava rather than
explosive eruptions. The low viscosity of the basaltic magma allows it to travel great
distances from the vent, building a wide, flat structure over time. The Hawaiian hotspot,
a mantle plume that has been active for millions of years, generates these volcanoes as
the Pacific Plate moves over it, creating a chain of islands. The gentle slopes and the
predominance of basalt are the defining characteristics that distinguish shield volcanoes
from other types, such as composite (stratovolcanoes) or cinder cones.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Landforms
MSC: NCLEX: N/A
Shield volcanoes...
CORRECT ANS: are associated with effusive eruptions, basalt lava, very hot
temperature
Expert Rationale
,Shield volcanoes are formed by effusive eruptions, which are characterized by the non-
explosive, steady flow of lava onto the surface. The lava that builds these volcanoes is
primarily basalt, which is a mafic rock with a low silica content. This low silica content
results in a very low viscosity, meaning the lava is very fluid and flows easily. Because the
lava is so fluid, it can travel long distances from the eruption site before cooling and
solidifying. The magma source for shield volcanoes is typically very hot, originating from
deep within the mantle (such as a hotspot). The high temperature of the magma is
another reason for its low viscosity. This combination of high temperature, low silica
content, and effusive eruption style is what creates the characteristic broad, gentle
slopes of shield volcanoes.
DIF: Cognitive Level: Understand (Comprehension) TOP: Volcanic Types and Eruptions
MSC: NCLEX: N/A
______ are mudflows due to rapid melting of snow packs along the sides of snow-
covered mountains.
CORRECT ANS: Lahars
Expert Rationale
Lahars are a specific type of volcanic hazard that consist of a destructive mudflow or
debris flow composed of a mixture of water, volcanic ash, rock fragments, and other
debris. The term is Indonesian in origin, reflecting the prevalence of this hazard in the
volcanically active archipelago. While lahars can be triggered by heavy rainfall on loose
volcanic material, they are often associated with the rapid melting of snow and ice (snow
packs) on the upper slopes of a snow-capped volcano. The intense heat from volcanic
activity, such as a lava flow or eruption, can quickly melt large volumes of snow and ice,
generating a torrent of water that mixes with loose volcanic sediment, creating a fast-
moving, highly destructive mudflow. Lahars can travel many miles down river valleys,
inundating communities and infrastructure long after the immediate volcanic eruption
has ceased.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Hazards
MSC: NCLEX: N/A
,Devil's Tower is a...
CORRECT ANS: Volcanic Neck
Expert Rationale
Devil's Tower in Wyoming is a prominent example of a volcanic neck, also known as a
volcanic plug. A volcanic neck is formed when magma hardens within the vent of an
active volcano. The surrounding rock, which is typically softer and more susceptible to
erosion, is gradually worn away by wind and water over millions of years, leaving behind
the more resistant igneous rock that once plugged the volcanic conduit. Devil's Tower is
particularly famous for its distinctive columnar jointing, which is caused by the cooling
and contraction of the volcanic rock. The exposed neck stands in stark contrast to the
surrounding landscape, which has been eroded away, making it a dramatic and
recognizable landform.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Landforms
MSC: NCLEX: N/A
A lava that has a glistening, ropy-like appearance associated with effusive eruptions is
known as...
CORRECT ANS: Pahoehoe
Expert Rationale
Pahoehoe is a Hawaiian term used to describe a type of basaltic lava with a smooth,
billowy, or ropy surface. This distinctive texture forms when highly fluid basaltic lava
flows out slowly and continuously. The surface of the flow cools and solidifies into a thin
crust, but the lava beneath continues to move, causing the crust to wrinkle and fold,
creating the characteristic ropy or coiled appearance. Pahoehoe flows are typically
associated with effusive eruptions of low-viscosity lava, where the lava is not breaking
up as it moves. It is a primary indicator of the lava's fluidity and the style of eruption,
contrasting with the more jagged and blocky A'a lava, which is formed by the same
composition but under different cooling and flow conditions.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Features
MSC: NCLEX: N/A
, The Columbia River Plateau was built from
CORRECT ANS: Basalt
Expert Rationale
The Columbia River Plateau, a large igneous province covering parts of Washington,
Oregon, and Idaho, was formed by massive outpourings of basaltic lava. These eruptions
occurred over a period of millions of years, primarily during the Miocene epoch, and
represent one of the largest flood basalt events on Earth. The lava erupted from fissures,
or long cracks in the Earth's surface, rather than from central volcanoes. The low
viscosity of the basaltic lava allowed it to spread across the landscape, building up
extensive, flat-lying layers of rock. The Columbia River Basalt Group, as it is known, is
composed of numerous individual flows that together cover an area of over 200,000
square kilometers, making it a classic example of a continental flood basalt province.
DIF: Cognitive Level: Remember (Knowledge) TOP: Volcanic Landforms
MSC: NCLEX: N/A
Meander
CORRECT ANS: Curve, sharp turn or twist in river
Expert Rationale
A meander is a pronounced curve, bend, or loop in the course of a river. These features
are a fundamental characteristic of river systems, particularly in their lower reaches
where the gradient is low and the river has developed a mature, sinuous channel.
Meanders form as a result of the river's natural tendency to flow in a sinuous path. The
process involves erosion on the outer bank of the bend (where the water flows faster
and has more energy) and deposition on the inner bank (where the water flows slower).
Over time, these processes cause the meander to become more pronounced and to
migrate laterally across the floodplain. A classic example of a river with well-developed
meanders is the Cuyahoga River in Ohio.
