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C165 OA 2026 Latest Questions and
Answers (100% Expert Answers) A+
Chemistry [ Ans: ] focuses on the study of atoms and molecules, their
structures, and their interactions to form various substances.
physics [ Ans: ] is the study of forces and energy. The forces that are
studied by physicists govern everything from sound waves to planetary
orbits.
Earth science [ Ans: ] this field focuses on Earth's structure and
composition, as well as the processes that change Earth, such as volcanic
and seismic activity. Modern Earth science also includes the studies of
other planets.
physical science [ Ans: ] involve the study of non-living systems, as
opposed to life science (e.g., biology), which is the study of living
systems.
© 2026
astronomy [ Ans: ] the branch of science which deals with celestial
objects, space, and the physical universe as a whole.
controlled experiment [ Ans: ] Scientists perform a controlled experiment
when they want to find out how changing one thing causes something
else to change.
variables [ Ans: ] In an experiment changing quantities are called:
independent variable [ Ans: ] It's what you change on purpose
dependent variable [ Ans: ] is the one that changes because of the
independent variable
control variable [ Ans: ] The variables that scientists do not wish to study
need to be either eliminated or kept constant
, 2
observational study [ Ans: ] Scientific observations can be done with our
own senses (sight, hearing, smell, taste, or touch) or by using tools
(telescopes, radiation detectors, multimeters, etc.). The systems are
observed as hey appear and researchers do not attempt to change them.
laboratory experiment [ Ans: ] researchers study the system of interest in
a highly controlled, artificial setting.
physical model [ Ans: ] is a model that can be touched.
conceptual model [ Ans: ] can be used to visualize things that cannot be
seen, such as atoms
mathematical model [ Ans: ] treat physical objects or phenomena using
mathematical methods. In these models, pertinent physical
characteristics are represented using formulas, graphs, or other
mathematical means. For example, the mathematical model below models
the wavelength and amplitude of a wave.
computer model [ Ans: ] are becoming increasingly important in
© 2026
explaining and predicting natural phenomena, such as weather patterns
and the detailed movements of objects in the solar system
principle of falsification [ Ans: ] is that only falsifiable statements can be
subject to scientific inquiry. A statement such as "a rock falls because
invisible demons pull it down" is not falsifiable, because no conceivable
experiment or observation could prove that invisible demons are not
pulling it.
Hypothesis [ Ans: ] is a testable statement about how something in
nature works. It is typically the best tentative assumption that
researchers can make based on the evidence they already have at that
point.
Theory [ Ans: ] is a statement that explains a wide range of observations
and that is supported by a large body of scientific evidence. It explains
how and why things happen
C165 OA 2026 Latest Questions and
Answers (100% Expert Answers) A+
Chemistry [ Ans: ] focuses on the study of atoms and molecules, their
structures, and their interactions to form various substances.
physics [ Ans: ] is the study of forces and energy. The forces that are
studied by physicists govern everything from sound waves to planetary
orbits.
Earth science [ Ans: ] this field focuses on Earth's structure and
composition, as well as the processes that change Earth, such as volcanic
and seismic activity. Modern Earth science also includes the studies of
other planets.
physical science [ Ans: ] involve the study of non-living systems, as
opposed to life science (e.g., biology), which is the study of living
systems.
© 2026
astronomy [ Ans: ] the branch of science which deals with celestial
objects, space, and the physical universe as a whole.
controlled experiment [ Ans: ] Scientists perform a controlled experiment
when they want to find out how changing one thing causes something
else to change.
variables [ Ans: ] In an experiment changing quantities are called:
independent variable [ Ans: ] It's what you change on purpose
dependent variable [ Ans: ] is the one that changes because of the
independent variable
control variable [ Ans: ] The variables that scientists do not wish to study
need to be either eliminated or kept constant
, 2
observational study [ Ans: ] Scientific observations can be done with our
own senses (sight, hearing, smell, taste, or touch) or by using tools
(telescopes, radiation detectors, multimeters, etc.). The systems are
observed as hey appear and researchers do not attempt to change them.
laboratory experiment [ Ans: ] researchers study the system of interest in
a highly controlled, artificial setting.
physical model [ Ans: ] is a model that can be touched.
conceptual model [ Ans: ] can be used to visualize things that cannot be
seen, such as atoms
mathematical model [ Ans: ] treat physical objects or phenomena using
mathematical methods. In these models, pertinent physical
characteristics are represented using formulas, graphs, or other
mathematical means. For example, the mathematical model below models
the wavelength and amplitude of a wave.
computer model [ Ans: ] are becoming increasingly important in
© 2026
explaining and predicting natural phenomena, such as weather patterns
and the detailed movements of objects in the solar system
principle of falsification [ Ans: ] is that only falsifiable statements can be
subject to scientific inquiry. A statement such as "a rock falls because
invisible demons pull it down" is not falsifiable, because no conceivable
experiment or observation could prove that invisible demons are not
pulling it.
Hypothesis [ Ans: ] is a testable statement about how something in
nature works. It is typically the best tentative assumption that
researchers can make based on the evidence they already have at that
point.
Theory [ Ans: ] is a statement that explains a wide range of observations
and that is supported by a large body of scientific evidence. It explains
how and why things happen
