GOL 105 STUDY EXAMS GUIDE ANSWERS AND
QUESTIONS SET A+
✔✔Which of the following is an example of an active continental-continental convergent
plate boundary?
a. the boundary between the Nazca and the Pacific plates
b. the boundary between the Nazca and the South American plates
c. portions of the boundary between the Australian-Indian and Pacific plates
d. portions of the boundary between the Australian-Indian and Eurasian plates - ✔✔d.
portions of the boundary between the Australian-Indian and Eurasian plates
✔✔Which of the following is an example of a transform plate margin?
a. the boundary between the Caribbean and South American plates
b. portions of the boundary between the North American and Pacific plates
c. the boundary between the Cocos and North American plates
d. the boundary between Nazca and South American plates - ✔✔b. portions of the
boundary between the North American and Pacific plates
✔✔What is the term for a chain of volcanic structures created by the movement of a
lithospheric plate over a mantle plume?
a. rift valley
b. continental volcanic arc
c. volcanic island arc
d. hot-spot track - ✔✔d. hot-spot track
✔✔According to J. Tuzo Wilson, which of the following do transform faults most often
connect?
a. volcanic island arcs
b. ocean basins and trenches
c. sections of spreading centers
, d. sections of trenches - ✔✔c. sections of spreading centers
✔✔Heat loss from Earth's surface leading to the cooling of lithospheric slabs is one of
the thermal processes that drive mantle convection. T/F - ✔✔True
✔✔Open Hint for Question 13 in a new window According to the "layering at 660 km"
model of mantle convection, basaltic lava erupted at ocean ridges is different in
composition from lava erupted at hot spots by volcanoes in Hawaii. Which of the
following is the proposed reason for this?
a. Lava at mid-ocean ridge originates from a deeper, more primitive magma source,
whereas lava that erupts at a hot spot is derived from the upper, well-mixed convective
layer.
b. Given the relatively short mixing times observed in the model, the "layering at 660
km" model of mantle convection states that the mantle should be well mixed.
c. Lava at hot spots originates from a deeper, more primitive magma source, whereas
lava that erupts along a mid-ocean ridge is derived from the upper, well-mixed
convective layer.
d. Lava at hot spots originates directly from the melting of a subducted oceanic plate,
whereas lava that erupts along - ✔✔c. Lava at hot spots originates from a deeper, more
primitive magma source, whereas lava that erupts along a mid-ocean ridge is derived
from the upper, well-mixed convective layer.
✔✔To explain continental drift, Wegener proposed that the continents broke through the
oceanic crust, much as icebreakers cut through ice. T/F - ✔✔True
✔✔According to Wegener's hypothesis that continents are moving today, what
supercontinent apparently broke up about 200 million years ago?
a. Harryhessland
b. Pangaea
c. Gondwanaland
d. Wegenerea - ✔✔b. Pangaea
✔✔What important contribution did Vine and Matthews make to the concept of seafloor
spreading and, consequently, plate tectonics?
a. Earth's magnetic poles have changed position through time.
b. Oceanic crust is 180 million years old or younger.
c. Deep earthquake activity is associated with oceanic trenches.
d. Magnetic patterns in oceanic crust recorded reversals of polarity and could be used
to create a time scale. - ✔✔d. Magnetic patterns in oceanic crust recorded reversals of
polarity and could be used to create a time scale.
QUESTIONS SET A+
✔✔Which of the following is an example of an active continental-continental convergent
plate boundary?
a. the boundary between the Nazca and the Pacific plates
b. the boundary between the Nazca and the South American plates
c. portions of the boundary between the Australian-Indian and Pacific plates
d. portions of the boundary between the Australian-Indian and Eurasian plates - ✔✔d.
portions of the boundary between the Australian-Indian and Eurasian plates
✔✔Which of the following is an example of a transform plate margin?
a. the boundary between the Caribbean and South American plates
b. portions of the boundary between the North American and Pacific plates
c. the boundary between the Cocos and North American plates
d. the boundary between Nazca and South American plates - ✔✔b. portions of the
boundary between the North American and Pacific plates
✔✔What is the term for a chain of volcanic structures created by the movement of a
lithospheric plate over a mantle plume?
a. rift valley
b. continental volcanic arc
c. volcanic island arc
d. hot-spot track - ✔✔d. hot-spot track
✔✔According to J. Tuzo Wilson, which of the following do transform faults most often
connect?
a. volcanic island arcs
b. ocean basins and trenches
c. sections of spreading centers
, d. sections of trenches - ✔✔c. sections of spreading centers
✔✔Heat loss from Earth's surface leading to the cooling of lithospheric slabs is one of
the thermal processes that drive mantle convection. T/F - ✔✔True
✔✔Open Hint for Question 13 in a new window According to the "layering at 660 km"
model of mantle convection, basaltic lava erupted at ocean ridges is different in
composition from lava erupted at hot spots by volcanoes in Hawaii. Which of the
following is the proposed reason for this?
a. Lava at mid-ocean ridge originates from a deeper, more primitive magma source,
whereas lava that erupts at a hot spot is derived from the upper, well-mixed convective
layer.
b. Given the relatively short mixing times observed in the model, the "layering at 660
km" model of mantle convection states that the mantle should be well mixed.
c. Lava at hot spots originates from a deeper, more primitive magma source, whereas
lava that erupts along a mid-ocean ridge is derived from the upper, well-mixed
convective layer.
d. Lava at hot spots originates directly from the melting of a subducted oceanic plate,
whereas lava that erupts along - ✔✔c. Lava at hot spots originates from a deeper, more
primitive magma source, whereas lava that erupts along a mid-ocean ridge is derived
from the upper, well-mixed convective layer.
✔✔To explain continental drift, Wegener proposed that the continents broke through the
oceanic crust, much as icebreakers cut through ice. T/F - ✔✔True
✔✔According to Wegener's hypothesis that continents are moving today, what
supercontinent apparently broke up about 200 million years ago?
a. Harryhessland
b. Pangaea
c. Gondwanaland
d. Wegenerea - ✔✔b. Pangaea
✔✔What important contribution did Vine and Matthews make to the concept of seafloor
spreading and, consequently, plate tectonics?
a. Earth's magnetic poles have changed position through time.
b. Oceanic crust is 180 million years old or younger.
c. Deep earthquake activity is associated with oceanic trenches.
d. Magnetic patterns in oceanic crust recorded reversals of polarity and could be used
to create a time scale. - ✔✔d. Magnetic patterns in oceanic crust recorded reversals of
polarity and could be used to create a time scale.
