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WGU C165 EXAM INTEGRATED PHYSICAL SCIENCES
OA EXAM A, B AND PRACTICE TEST ALL 420
QUESTIONS AND CORRECT SOLUTIONS LATEST
2024-2025
WGU C165 EXAM INTEGRATED PHYSICAL SCIENCES OA- PRACTICE TEST
QUESTION: Which physics topic would be the MOST important in chemistry? - ANSWER-how
atoms bond to each other because of electric attraction of oppositely charged electrons and
nuclei
QUESTION: The science BEST for studying photosynthetic bacteria is - ANSWER-life science
QUESTION: A space probe is an unmanned spacecraft. Which of these terms BEST describes a
research project in which a space probe is sent to collect soil samples on planet Mars and then
report the data back to Earth? - ANSWER-a field study
QUESTION: Which of these terms BEST describes a research project in which a big telescope is
placed on a high mountain in Arizona to study the brightness stability of the sun? - ANSWER-an
observational study
QUESTION: Which of these fields depends the MOST on observational studies? - ANSWER-
QUESTION: The kinetic theory of gases is based on the assumption that the molecules that form
the gas are in random motion and bounce off the walls of their container and off each other as
if they were billiard balls. The forces between real molecules are more complicated. This is an
example of - ANSWER-using a model
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QUESTION: Why can't astronomers carry out a scientific research study to determine which
visible star, other than our sun, is the nicest? - ANSWER-There is no way to prove any answer
wrong.
QUESTION: In 1811, physicist Amedo Avogadro proposed that the same volume of two different
gases at the same temperature and pressure contain the same number of molecules. His
proposal received little attention until the 1850s, when chemist Stanislao Cannizzaro, in
particular, argued that Avogadro's idea agreed with all the physical and chemical laws
discovered up to that time.
Today, Avogadro's statement about gases is sometimes referred to as "Avogadro's hypothesis"
or "Avogadro's law." Which statement describes when each of those two terms would be MOST
accurately applied? - ANSWER-It is most accurately described as a hypothesis starting in 1811,
but a law after the 1850's.
QUESTION: Which of these describes a statement that has usually NOT yet been tested? -
ANSWER-a hypothesis
QUESTION: It is often said that you can never prove a scientific theory right. Why? - ANSWER-It
is impossible to directly test every single instance in which it applies.
QUESTION: Which of these is generally regarded by scientists to be the basis for deciding issues
in science? - ANSWER-empirical evidence including experiments and observations
QUESTION: Which of the following describes how scientific investigations are carried out? -
ANSWER-Scientists use different procedures but rely on evidence and testing to confirm their
ideas.
QUESTION: Different explanations for the origin of the universe were favored at different times.
The static model stated that the universe always existed as it is now. Another explanation was
the steady state model that the universe has no beginning and matter is being created to fill in
as the universe expands. The third was the big bang model.
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What led scientists to settle on the big bang explanation that the universe began from a tiny
point? - ANSWER-Evidence was found such as the leftover radiation from the big bang and the
correct fractions of certain kinds of atoms.
QUESTION: A team of scientists wants to investigate whether objects slide on sand with less
friction if the sand is wet. Suppose they have not yet carried out any experiments.
The statement they are investigating, that the friction of sliding on sand is reduced if the sand is
wet, is an example of a(n) - ANSWER-hypothesis
QUESTION: Galileo found that when air resistance can be ignored, heavier and lighter objects
fall in the same way. He tested this rule and confirmed it was consistent with all available data.
The rule Galileo found can BEST be described as a - ANSWER-
QUESTION: In what sense was Rutherford's planetary model of the atom a model? - ANSWER-It
represented the atom in terms of a more familiar system to which it was analogous.
QUESTION: Which of these fields depends the MOST on field studies? - ANSWER-Earth Science
QUESTION: When a candle burns, its molecules consisting of hydrogen and carbon atoms
combine with oxygen to produce carbon dioxide and water.
The physical science that is BEST for dealing with the changes of the paraffin into carbon
dioxide and water is - ANSWER-chemistry
QUESTION: The observational balloon is filled with helium and vented to the atmosphere. The
height it reaches depends on the changes of the atmospheric pressure during the day and night
cycle. The science BEST for studying this daily warming and cooling of the atmosphere is -
ANSWER-Earth Science
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QUESTION: The sun produces its energy by nuclear fusion reactions, in which smaller nuclei are
combined to produce larger nuclei. Forces responsible for the nuclear fusion are called nuclear
forces. The physical science that studies nuclear forces is - ANSWER-physics
QUESTION: Some students carry out an experiment in which they tilt a wooden plank by
propping up one end with books, so that its height is a distance h above the table. The students
release a steel ball bearing at different positions along the ramp measured as x. Each time they
do this for a different value of x, they measure the speed of the ball bearing at the end of the
ramp.
In this experiment, the independent variable is: - ANSWER-x
QUESTION: Some students carry out an experiment in which they tilt a wooden plank by
propping up one end with books, so that its height is a distance h above the table. The students
release a steel ball bearing at different positions along the ramp measured as x. Each time they
do this for a different value of x, they measure the speed of the ball bearing at the end of the
ramp.
The dependent variable is: - ANSWER-speed
The details of how moving water flowing around an object such as a pebble can exert enough
force to lift it and carry it. - ANSWER-physics
QUESTION: The detailed mechanisms by which acidic pollutants in the river water change
limestone, which does not dissolve, into partially soluble material, causing a large rock to
weather? - ANSWER-chemistry
QUESTION: The effect of weathering and erosion on features of the landscape over long periods
of time. - ANSWER-Earth Science
QUESTION: Comparison of the fin structures and their use in different species of fish. -
ANSWER-life science
4
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