GL101 Exam Study Guide –
Practice Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update
The Precambrian (Hadean, Archean and Proterozoic Eons) accounts for ________.
A) the first 88% of Earth history and the geologic time scale
B) the segment of geologic time prior to uniformitarianism taking effect
C) all of the periods after the Permian
D) the first 8% of Earth history - Answer✔✔ -A
Which sequence is in the correct order through time for "fossil succession"
assuming strata successively from: Late Precambrian, Cambrian, Silurian, Jurassic,
Tertiary
A) multicelled organisms, hardbodied marine invertebrates, first land plants,
dinosaurs, mammals
B) flowering plants, birds, reptiles, first trees, first fishes, blue green algae
C) one-celled organisms, first fishes, first amphibians, reptiles, dinosaurs
D) land plants, insects, marine plants, trilobites, humans - Answer✔✔ -A
,The ________ theory is the leading hypothesis that describes the formation of the
Sun, Earth, and other planets of the solar system
A) planoassemblar
B) nebular
C) astrostellar
D) solar flareup - Answer✔✔ -B
The Earth's core was formed from ________.
A) a massive nickle iron asteroid that was the nucleus upon which Earth
condensed
B) high density radioactive carbon
C) the left over nickle and iron that would not fit into the earlier formed crust
and mantle
D) molten iron and nickle that separated from silicates and sank due to its
higher density - Answer✔✔ -D
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 - Answer✔✔ -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 - Answer✔✔ -D
Wegener's supercontinent that began to break up about 200 million years ago was
named
A) Gondwanaland
B) Laurasia
C) Pangaea
D) Rodinia - Answer✔✔ -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 - Answer✔✔ -D
The ________ forms the relatively cool, brittle plates of plate tectonics.
A) asthenosphere
B) lithosphere
C) astrosphere
, D) eosphere - Answer✔✔ -B
A typical rate of lithospheric (tectonic) plate movement is ________.
A) 2 metres per year
B) 0.1 centimetres per year
C) 20 metres per year
D) 5 centimetres per year - Answer✔✔ -D
New seafloor is created at ________ plate boundaries.
A) convergent
B) divergent
C) transform
D) hot spot - Answer✔✔ -B
The ________ is the thinnest layer of the Earth.
A) crust
B) outer core
C) mantle
D) inner core - Answer✔✔ -A
The oceanic crust is made of mafic rock called ________ and is about ________
thick on average.
A) basalt, 7 km
Practice Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update
The Precambrian (Hadean, Archean and Proterozoic Eons) accounts for ________.
A) the first 88% of Earth history and the geologic time scale
B) the segment of geologic time prior to uniformitarianism taking effect
C) all of the periods after the Permian
D) the first 8% of Earth history - Answer✔✔ -A
Which sequence is in the correct order through time for "fossil succession"
assuming strata successively from: Late Precambrian, Cambrian, Silurian, Jurassic,
Tertiary
A) multicelled organisms, hardbodied marine invertebrates, first land plants,
dinosaurs, mammals
B) flowering plants, birds, reptiles, first trees, first fishes, blue green algae
C) one-celled organisms, first fishes, first amphibians, reptiles, dinosaurs
D) land plants, insects, marine plants, trilobites, humans - Answer✔✔ -A
,The ________ theory is the leading hypothesis that describes the formation of the
Sun, Earth, and other planets of the solar system
A) planoassemblar
B) nebular
C) astrostellar
D) solar flareup - Answer✔✔ -B
The Earth's core was formed from ________.
A) a massive nickle iron asteroid that was the nucleus upon which Earth
condensed
B) high density radioactive carbon
C) the left over nickle and iron that would not fit into the earlier formed crust
and mantle
D) molten iron and nickle that separated from silicates and sank due to its
higher density - Answer✔✔ -D
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 - Answer✔✔ -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 - Answer✔✔ -D
Wegener's supercontinent that began to break up about 200 million years ago was
named
A) Gondwanaland
B) Laurasia
C) Pangaea
D) Rodinia - Answer✔✔ -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 - Answer✔✔ -D
The ________ forms the relatively cool, brittle plates of plate tectonics.
A) asthenosphere
B) lithosphere
C) astrosphere
, D) eosphere - Answer✔✔ -B
A typical rate of lithospheric (tectonic) plate movement is ________.
A) 2 metres per year
B) 0.1 centimetres per year
C) 20 metres per year
D) 5 centimetres per year - Answer✔✔ -D
New seafloor is created at ________ plate boundaries.
A) convergent
B) divergent
C) transform
D) hot spot - Answer✔✔ -B
The ________ is the thinnest layer of the Earth.
A) crust
B) outer core
C) mantle
D) inner core - Answer✔✔ -A
The oceanic crust is made of mafic rock called ________ and is about ________
thick on average.
A) basalt, 7 km
