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WGU C165 EXAM INTEGRATED PHYSICAL SCIENCES OA
EXAM ACTUAL EXAM QUESTION BANK VERSION 1, 2, 3
AND STUDY GUIDE COMPLETE 550 QUESTIONS AND
CORRECT SOLUTIONS
WGU C165 EXAM INTEGRATED PHYSICAL SCIENCES OA EXAM -STUDY GUIDE
Describe how and why air density changes with changes in altitude. - ANSWER-Air density
decreases with an increase in altitude because air
particles have mass and are pulled down by Earth's gravity.
QUESTION: Density is defined as - ANSWER-mass divided by volume
QUESTION: Nitrogen is about _____ of the Earths atmosphere - ANSWER-78%
QUESTION: A mechanical wave cannot travel through a - ANSWER-vacuum
QUESTION: In which layer is the ozone layer located? - ANSWER-Stratosphere
QUESTION: Where does Earth's weather happen? - ANSWER-Troposphere
QUESTION: The International Space Station orbits Earth within the - ANSWER-thermosphere
1
,Page 2 of 186
QUESTION: This is the coldest layer, with temperatures down to
90°C (194°F). The
air is very thin, but still thick enough to burn up meteors. - ANSWER-Mesosphere
QUESTION: The air is very thin here. A vacuum exists above this layer. - ANSWER-exosphere
QUESTION: Sound waves cannot travel in a vacuum because - ANSWER-they are mechanical
waves
QUESTION: Atmospheric pressure increases as humidity - ANSWER-decreases
QUESTION: Temperature decreases with altitude in the - ANSWER-Troposphere
QUESTION: The warm, moist air has a lower pressure and will - ANSWER-rise above the cold,
dry air.
QUESTION: A pure substance contains - ANSWER-a single type of element or compound.
2
,Page 3 of 186
QUESTION: Warm air is less dense than - ANSWER-cold air
QUESTION: Wind strength depends on differences in - ANSWER-air pressure
QUESTION: Which of the following factors MOST DIRECTLY affect the strength
and direction of winds? - ANSWER-differences in air pressure and Earth's rotation
QUESTION: Because of the tilt of Earth, different latitudes on Earth experience
different - ANSWER-temperatures
QUESTION: These prevailing winds were originally blowing from the equator toward - ANSWER-
the south pole
QUESTION: prevailing winds - ANSWER-get deflected north
QUESTION: Auroras are bursts of light that happen when charged particles from the sun
interact with Earth's
magnetic field and atoms and molecules in our atmosphere.
Which physical science is BEST SUITED explain the interactions of the charged particles with
Earth's magnetic field - ANSWER-physics
3
, Page 4 of 186
QUESTION: The physical science that is BEST for finding the best locations to drill for the
petroleum used to make the candles is - ANSWER-Earth science
QUESTION: The science BEST for studying how hydrogen sulfide and carbon dioxide react is -
ANSWER-chemistry
QUESTION: The science BEST for studying photosynthetic bacteria is - ANSWER-life science
QUESTION: Which of the following terms best describes a research project that involves
sending a space probe to a distant asteroid to land on it and collect data?
a controlled experiment - ANSWER-field study
QUESTION: Which of these fields depends the MOST on observational
studies? - ANSWER-Earth science
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.
4
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