WGU C165 OA EXAM Integrated Physical
Sciences OA 250 Latest Questions and
Answers (2026) | Updated Comprehensive
Review with Detailed Rationales | A+
Verified
• Chemistry: -✓✓The study of atoms and molecules, their structures, and
their interactions to form various substances.
• Physics: -✓✓The study of forces, energy and motion.
• Earth Science: -✓✓This field focuses on Earth's structure and
composition, as well as the processes that change Earth, such as volcanic
and seismic activity.
• Physical Science: -✓✓The scientific study of nonliving matter. Ex:
chemistry, physics, and Earth science.
• Astronomy: -✓✓The study of the moon, stars, and other objects in
space.
• Controlled Experiment: -✓✓An experiment in which only one variable
is manipulated at a time..
,• Independent Variable: -✓✓The variable that is manipulated in an
experiment.
• Dependent Variable: -✓✓The outcome factor; the variable that may
change in response to manipulations of the independent variable.
• Control Variable: -✓✓A variable that is kept constant during a
controlled experiment.
• Observational Study: -✓✓The systems are observed as they appear in
nature and researchers do not attempt to change them.
• Laboratory Experiment: -✓✓Researchers study the system of interest
in a highly controlled artificial setting (lab).
• Physical Model: -✓✓A physical representation of an object. Ex: Scaled
down version of the solar system.
• Conceptual Model: -✓✓A verbal or graphical explanation for how a
system works or is organized. Ex: posters, charts.
• Mathematical Model: -✓✓Uses different forms of data to represent the
way a system or process works. Ex: formulas, graphs, mathematical
means. Ex: F=ma (formula).
,• Computer Model: -✓✓A computer program that models an event or
object. Important in explaining and predicting natural phenomena. Ex:
weather patterns, solar system.
• Principle of Falsification: -✓✓Principle that only falsifiable statements
can be subject to scientific inquiry.
• Hypothesis: -✓✓A testable prediction, often implied by a theory.
• Theory: -✓✓A hypothesis that has been tested with a significant
amount of data.
• Law: -✓✓A concise statement that is supported by scientific evidence
and repeated experiments. Describes a widespread pattern in nature.
Intended to be universal.
• Scientific Investigation: -✓✓Scientists test their ideas with a variety of
different types of investigations. Ex: laboratories, controlled
experiments, astronomy, field studies, models.
• SI System: -✓✓International System of units based on the metric
system and units derived from the metric system.
• Base Quantities: -✓✓Seven designated physical quantities (sets) from
which all other SI quantities can be derived.
, (1) Meter (m)-length
(2) Kilogram (k)-mass
(3) Second (s)-time
(4) Kelvin (K)-temperature
(5) Amperes (A)-"amp"-electric current
(6) Candela (cd)-light intensity
(7) Moles (mol)-amount of substance
• Time: -✓✓Base quantity that measures how long an event lasts or the
break between events.
• Length: -✓✓Used to describe the distance between two objects, or the
two ends of an object.
• Mass: -✓✓Used to describe the amount of matter in an object.
• Temperature: -✓✓A measure of how hot or cold something is.
• Gram: -✓✓a metric unit of mass equal to one thousandth of a
kilogram.
• Meter: -✓✓The base unit of length in the metric system. Unit symbol
(m).
Sciences OA 250 Latest Questions and
Answers (2026) | Updated Comprehensive
Review with Detailed Rationales | A+
Verified
• Chemistry: -✓✓The study of atoms and molecules, their structures, and
their interactions to form various substances.
• Physics: -✓✓The study of forces, energy and motion.
• Earth Science: -✓✓This field focuses on Earth's structure and
composition, as well as the processes that change Earth, such as volcanic
and seismic activity.
• Physical Science: -✓✓The scientific study of nonliving matter. Ex:
chemistry, physics, and Earth science.
• Astronomy: -✓✓The study of the moon, stars, and other objects in
space.
• Controlled Experiment: -✓✓An experiment in which only one variable
is manipulated at a time..
,• Independent Variable: -✓✓The variable that is manipulated in an
experiment.
• Dependent Variable: -✓✓The outcome factor; the variable that may
change in response to manipulations of the independent variable.
• Control Variable: -✓✓A variable that is kept constant during a
controlled experiment.
• Observational Study: -✓✓The systems are observed as they appear in
nature and researchers do not attempt to change them.
• Laboratory Experiment: -✓✓Researchers study the system of interest
in a highly controlled artificial setting (lab).
• Physical Model: -✓✓A physical representation of an object. Ex: Scaled
down version of the solar system.
• Conceptual Model: -✓✓A verbal or graphical explanation for how a
system works or is organized. Ex: posters, charts.
• Mathematical Model: -✓✓Uses different forms of data to represent the
way a system or process works. Ex: formulas, graphs, mathematical
means. Ex: F=ma (formula).
,• Computer Model: -✓✓A computer program that models an event or
object. Important in explaining and predicting natural phenomena. Ex:
weather patterns, solar system.
• Principle of Falsification: -✓✓Principle that only falsifiable statements
can be subject to scientific inquiry.
• Hypothesis: -✓✓A testable prediction, often implied by a theory.
• Theory: -✓✓A hypothesis that has been tested with a significant
amount of data.
• Law: -✓✓A concise statement that is supported by scientific evidence
and repeated experiments. Describes a widespread pattern in nature.
Intended to be universal.
• Scientific Investigation: -✓✓Scientists test their ideas with a variety of
different types of investigations. Ex: laboratories, controlled
experiments, astronomy, field studies, models.
• SI System: -✓✓International System of units based on the metric
system and units derived from the metric system.
• Base Quantities: -✓✓Seven designated physical quantities (sets) from
which all other SI quantities can be derived.
, (1) Meter (m)-length
(2) Kilogram (k)-mass
(3) Second (s)-time
(4) Kelvin (K)-temperature
(5) Amperes (A)-"amp"-electric current
(6) Candela (cd)-light intensity
(7) Moles (mol)-amount of substance
• Time: -✓✓Base quantity that measures how long an event lasts or the
break between events.
• Length: -✓✓Used to describe the distance between two objects, or the
two ends of an object.
• Mass: -✓✓Used to describe the amount of matter in an object.
• Temperature: -✓✓A measure of how hot or cold something is.
• Gram: -✓✓a metric unit of mass equal to one thousandth of a
kilogram.
• Meter: -✓✓The base unit of length in the metric system. Unit symbol
(m).
