WGU C165 OA EXAM INTEGRATED PHYSICAL
SCIENCES OA ACTUAL EXAM QUESTION BANK
250 LATEST UPDATED VERSION WITH
ACCURATE QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS
Geological Time Scale (GTS): - answer✔A scale used by scientists that represents
the history of the Earth; divided into four large segments called Eons: Hadean,
Archean, Proterozoic, and Phanerozoic.
Geological Era: - answer✔A subdivision of geological time that divides an eon into
smaller units of time.
Proterozoic Eon (Precambrian Era): - answer✔2,500 million to 542 million years
ago. Resulted in accumulation of oxygen in the atmosphere and appearance of
multicellular organisms.
Paleozoic Era (Phanerozoic Eon): - answer✔"Old Life"; 541 to 251.902 million
years ago; subdivided into six geological periods-Cambrian, Ordovician, Silurian,
Devonian, Carboniferous, and Permian; land plants appeared during this era; rapid
diversification occurred during this era; time of great change on the Earth.
Mesozoic Era (Phanerozoic Eon): - answer✔"Middle Life"; 252-66 million years
ago; dinosaurs appeared; the breakup of Pangaea (all land) occurred during this
era; began and ended with major extinction events.
,Cenozoic Era (Phanerozoic Eon): - answer✔"New Life"; current and most recent
of the three Phanerozoic geological eras. 66 million years ago-present day; final
era of this eon; evolution of hominids occurred during this era; known as the age of
mammals.
Analog: - answer✔A close approximation of the long term behavior of materials
and processes found in a geological feature; geologists use it to determine how
rocks were formed.
Principle of Superposition: - answer✔States that in any sequence of undeformed
sedimentary rocks, each bed is younger than the one below it and older than the
one above it.
Principle of Crosscutting Relationships: - answer✔Used to determine the relative
ages of different rocks; States if a rock, fault, or other feature cuts through a rock
layer, that rock layer must have been pre-existing in order to have been cut
through.
Unconformity: - answer✔A buried erosional surface; suggests a period for which
no rock record exists.
Fossil Record: - answer✔Chronological collection of life's remains in sedimentary
rock layers.
Plate Tetonics: - answer✔Theory that states the Earth's outermost layer (the crust
and the uppermost mantle) consists of separate pieces that are moving slowly
relative to each other.
,Earthquake: - answer✔A sudden shaking of the ground that occurs when rocks in
Earth's crust break suddenly releasing energy.
Volcano: - answer✔An opening in the Earth's crust through which molten rock and
gases erupt on Earth's surface.
Continental Drift: - answer✔The hypothesis that states that the continents once
formed a single landmass, broke apart, and drifted to their present locations.
Seafloor Spreading - answer✔The process by which new oceanic crust forms along
a mid-ocean ridge and older oceanic crust moves away from the ridge
Plate Boundaries: - answer✔The edges of tectonic plates.
Divergent Boundary: - answer✔A type of plate boundary where the plates are
moving apart, or diverging.
Transform Boundary: - answer✔A type of plate boundary where the plates are
grinding past each other.
Convergent Boundary: - answer✔A type of plate boundary where the plates push
into each other.
Oceanic to Continental: - answer✔A type of convergent boundary between the
seafloor portion of one plate and the continental portion of another pate; the ocean
plate sinks under the continental and into the mantle below (subduction); an
, important feature for this type of boundary is a deep ocean trench; form volcanic
mountains on land.
Oceanic to Oceanic: - answer✔A type of convergent boundary between two
oceanic plates, where one plate suducts below the other; forms a deep ocean trench
and a chain of volcanoes; a feature of this type of boundary is volcanic islands.
Continental to Continental: - answer✔A type of convergent boundary where two
continental plates converge but no subduction occurs; the crust is force upward
forming very tall mountains.
Atmosphere: - answer✔The layer of gases that surround Earth (and other planets);
divided into five layers-troposphere, stratosphere, mesosphere, thermosphere,
exosphere.
Air Density: - answer✔The spacing between air particles; mass-(divided by)-per
unit of volume; SI unit=kg/m(3); air density decreases as you go higher.
Troposphere: - answer✔The first and lowest layer of the Earth's atmosphere;
extends from the Earth's surface to the altitude of about 8 km (at the poles) to 16
km (at the equator); densest layer, contains about 75-80% of the mass of the
atmosphere; air is in constant motion in this layer; weather occurs at this layer.
Stratosphere: - answer✔The second-lowest layer of Earth's atmosphere; altitude
extends to about 50 km (30 mi.) above the ground; contains the ozone layer; very
stable layer; airplanes fly at this altitude.
SCIENCES OA ACTUAL EXAM QUESTION BANK
250 LATEST UPDATED VERSION WITH
ACCURATE QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS
Geological Time Scale (GTS): - answer✔A scale used by scientists that represents
the history of the Earth; divided into four large segments called Eons: Hadean,
Archean, Proterozoic, and Phanerozoic.
Geological Era: - answer✔A subdivision of geological time that divides an eon into
smaller units of time.
Proterozoic Eon (Precambrian Era): - answer✔2,500 million to 542 million years
ago. Resulted in accumulation of oxygen in the atmosphere and appearance of
multicellular organisms.
Paleozoic Era (Phanerozoic Eon): - answer✔"Old Life"; 541 to 251.902 million
years ago; subdivided into six geological periods-Cambrian, Ordovician, Silurian,
Devonian, Carboniferous, and Permian; land plants appeared during this era; rapid
diversification occurred during this era; time of great change on the Earth.
Mesozoic Era (Phanerozoic Eon): - answer✔"Middle Life"; 252-66 million years
ago; dinosaurs appeared; the breakup of Pangaea (all land) occurred during this
era; began and ended with major extinction events.
,Cenozoic Era (Phanerozoic Eon): - answer✔"New Life"; current and most recent
of the three Phanerozoic geological eras. 66 million years ago-present day; final
era of this eon; evolution of hominids occurred during this era; known as the age of
mammals.
Analog: - answer✔A close approximation of the long term behavior of materials
and processes found in a geological feature; geologists use it to determine how
rocks were formed.
Principle of Superposition: - answer✔States that in any sequence of undeformed
sedimentary rocks, each bed is younger than the one below it and older than the
one above it.
Principle of Crosscutting Relationships: - answer✔Used to determine the relative
ages of different rocks; States if a rock, fault, or other feature cuts through a rock
layer, that rock layer must have been pre-existing in order to have been cut
through.
Unconformity: - answer✔A buried erosional surface; suggests a period for which
no rock record exists.
Fossil Record: - answer✔Chronological collection of life's remains in sedimentary
rock layers.
Plate Tetonics: - answer✔Theory that states the Earth's outermost layer (the crust
and the uppermost mantle) consists of separate pieces that are moving slowly
relative to each other.
,Earthquake: - answer✔A sudden shaking of the ground that occurs when rocks in
Earth's crust break suddenly releasing energy.
Volcano: - answer✔An opening in the Earth's crust through which molten rock and
gases erupt on Earth's surface.
Continental Drift: - answer✔The hypothesis that states that the continents once
formed a single landmass, broke apart, and drifted to their present locations.
Seafloor Spreading - answer✔The process by which new oceanic crust forms along
a mid-ocean ridge and older oceanic crust moves away from the ridge
Plate Boundaries: - answer✔The edges of tectonic plates.
Divergent Boundary: - answer✔A type of plate boundary where the plates are
moving apart, or diverging.
Transform Boundary: - answer✔A type of plate boundary where the plates are
grinding past each other.
Convergent Boundary: - answer✔A type of plate boundary where the plates push
into each other.
Oceanic to Continental: - answer✔A type of convergent boundary between the
seafloor portion of one plate and the continental portion of another pate; the ocean
plate sinks under the continental and into the mantle below (subduction); an
, important feature for this type of boundary is a deep ocean trench; form volcanic
mountains on land.
Oceanic to Oceanic: - answer✔A type of convergent boundary between two
oceanic plates, where one plate suducts below the other; forms a deep ocean trench
and a chain of volcanoes; a feature of this type of boundary is volcanic islands.
Continental to Continental: - answer✔A type of convergent boundary where two
continental plates converge but no subduction occurs; the crust is force upward
forming very tall mountains.
Atmosphere: - answer✔The layer of gases that surround Earth (and other planets);
divided into five layers-troposphere, stratosphere, mesosphere, thermosphere,
exosphere.
Air Density: - answer✔The spacing between air particles; mass-(divided by)-per
unit of volume; SI unit=kg/m(3); air density decreases as you go higher.
Troposphere: - answer✔The first and lowest layer of the Earth's atmosphere;
extends from the Earth's surface to the altitude of about 8 km (at the poles) to 16
km (at the equator); densest layer, contains about 75-80% of the mass of the
atmosphere; air is in constant motion in this layer; weather occurs at this layer.
Stratosphere: - answer✔The second-lowest layer of Earth's atmosphere; altitude
extends to about 50 km (30 mi.) above the ground; contains the ozone layer; very
stable layer; airplanes fly at this altitude.
