GL101 EXAM REVIEW EXAM WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Which one of the following is an important fundamental
assumption underlying the plate tectonic theory?
A) Earth's magnetic field originates in the outer core.
B) Earth's diameter has been essentially constant over time.
C) Radioactive decay slows down at the extreme pressures
of the inner core.
D) Earth's ocean basins are very old and stable features. -
ANSWERS-B
The lithospheric plates in modern plate tectonic theory
differ significantly from Wegener's continental drift
hypothesis in that ________.
A) they are significantly thinner
B) several of the largest plates include both continental and
oceanic crust
,C) it is the oceans that do all of the moving, not the
continents
D) we now know that the plate motions are driven by
massive magnetic reversals - ANSWERS-B
Linear, magnetic patterns associated with mid-ocean ridges
are configured as ________.
A) concentric circles about a rising plume of hot, mantle
magma
B) reversed magnetizations along the present day rift valleys
and normal magnetizations along the adjacent ridge
C) normal and reversed magnetized stripes roughly parallel
to the ridge
D) normal and reversed magnetized stripes roughly
perpendicular to the ridge axis - ANSWERS-C
What was the smallest Richter magnitude that can be felt by
a human?
A) 0.5
B) 1.0
C) 2.0
D) 4.0 - ANSWERS-C
,The ________ of the Earth does not transmit S waves.
A) outer mantle
B) inner crust
C) outer core
D) deep mantle - ANSWERS-C
In the early part of the 20th century, ________ argued
forcefully for continental drift.
A) Karl Wagner
B) Edwin Rommel
C) Alfred Wegener
D) Alfred the Great - ANSWERS-C
Pangaea was ________.
A) a large, ocean basin that opened in the Triassic and
closed in the Paleocene
B) a large, Precambrian shield area in Africa and South
America that broke apart late in the Proterozoic Eon
C) a huge mountain range that formed when Africa pushed
northward into Europe in Eocene time
D) a super continent that formed in the late Paleozoic and
broke apart in Triassic time - ANSWERS-D
, Wegener's supercontinent that began to break up about 200
million years ago was named
A) Gondwanaland
B) Laurasia
C) Pangaea
D) Rodinia - ANSWERS-C
According to Wegener, where was southern Africa located
during the Late Paleozoic?
A) up by the north pole
B) 30° south of the equator
C) along the equator
D) over the south pole - ANSWERS-D
The ________ forms the relatively cool, brittle plates of
plate tectonics.
A) asthenosphere
B) lithosphere
C) astrosphere
D) eosphere - ANSWERS-B
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Which one of the following is an important fundamental
assumption underlying the plate tectonic theory?
A) Earth's magnetic field originates in the outer core.
B) Earth's diameter has been essentially constant over time.
C) Radioactive decay slows down at the extreme pressures
of the inner core.
D) Earth's ocean basins are very old and stable features. -
ANSWERS-B
The lithospheric plates in modern plate tectonic theory
differ significantly from Wegener's continental drift
hypothesis in that ________.
A) they are significantly thinner
B) several of the largest plates include both continental and
oceanic crust
,C) it is the oceans that do all of the moving, not the
continents
D) we now know that the plate motions are driven by
massive magnetic reversals - ANSWERS-B
Linear, magnetic patterns associated with mid-ocean ridges
are configured as ________.
A) concentric circles about a rising plume of hot, mantle
magma
B) reversed magnetizations along the present day rift valleys
and normal magnetizations along the adjacent ridge
C) normal and reversed magnetized stripes roughly parallel
to the ridge
D) normal and reversed magnetized stripes roughly
perpendicular to the ridge axis - ANSWERS-C
What was the smallest Richter magnitude that can be felt by
a human?
A) 0.5
B) 1.0
C) 2.0
D) 4.0 - ANSWERS-C
,The ________ of the Earth does not transmit S waves.
A) outer mantle
B) inner crust
C) outer core
D) deep mantle - ANSWERS-C
In the early part of the 20th century, ________ argued
forcefully for continental drift.
A) Karl Wagner
B) Edwin Rommel
C) Alfred Wegener
D) Alfred the Great - ANSWERS-C
Pangaea was ________.
A) a large, ocean basin that opened in the Triassic and
closed in the Paleocene
B) a large, Precambrian shield area in Africa and South
America that broke apart late in the Proterozoic Eon
C) a huge mountain range that formed when Africa pushed
northward into Europe in Eocene time
D) a super continent that formed in the late Paleozoic and
broke apart in Triassic time - ANSWERS-D
, Wegener's supercontinent that began to break up about 200
million years ago was named
A) Gondwanaland
B) Laurasia
C) Pangaea
D) Rodinia - ANSWERS-C
According to Wegener, where was southern Africa located
during the Late Paleozoic?
A) up by the north pole
B) 30° south of the equator
C) along the equator
D) over the south pole - ANSWERS-D
The ________ forms the relatively cool, brittle plates of
plate tectonics.
A) asthenosphere
B) lithosphere
C) astrosphere
D) eosphere - ANSWERS-B
