WGU C165 OA EXAM INTEGRATED PHYSICAL SCIENCES
OA 2023-2024 ACTUAL EXAM QUESTION BANK 400
QUESTIONS AND CORRECT DETAILED
ANSWERS|ALREADY GRADED A+
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.
Density is defined as – ANSWER- mass divided by volume.
Nitrogen is about _ of the Earths atmosphere – ANSWER- 78%
A mechanical wave cannot travel through a – ANSWER- vacuum.
In which layer is the ozone layer located? – ANSWER- Stratosphere
Where does Earth’s weather happen? – ANSWER- Troposphere
The troposphere is – ANSWER- the densest of the atmospheric layers.
The exosphere is the least – ANSWER- dense atmospheric layer.
The International Space Station orbits Earth within the – ANSWERthermosphere.
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. – ANSWERMesosphere
Temperatures are very high here, although the density of air molecules is
very low. The International Space Station orbits in this layer. –
ANSWER- Thremosphere
The air is very thin here. A vacuum exists above this layer. – ANSWERexosphere.
Sound waves cannot travel in a vacuum because – ANSWER- they are
mechanical waves
Atmospheric pressure increases as humidity – ANSWER- decreases.
Temperature decreases with altitude in the – ANSWER- troposphere.
The warm, moist air has a lower pressure and will – ANSWER- rise
above the cold, dry air.
Air pressure decreases with – ANSWER- temperature and humidity, so a
warm, moist air mass will have a lower pressure than a cold, dry air
mass.
A pure substance contains – ANSWER- a single type of element or
compound.
Warm air is less dense than – ANSWER- cold air
Wind strength depends on differences in – ANSWER- air pressure
Which of the following factors MOST DIRECTLY affect the strength
and direction of winds? – ANSWER- differences in air pressure and
Earth’s rotation
Because of the tilt of Earth, different latitudes on Earth experience
different – ANSWER- temperatures
These prevailing winds were originally blowing from the equator toward
the – ANSWER- South Pole.
prevailing winds – ANSWER- get deflected from north-south direction,
due to the Coriolis effect, which exists because of Earth’s rotation.
Which statement describes the trade winds? – ANSWER- The trade
winds travel toward the low-pressure system near the equator but veer
westward because of the Coriolis effect.
As warm air rises it tends to – ANSWER- cool and become more dense
The largest reservoir(s) of freshwater (non-salt) on Earth is (are) –
ANSWER- Glaciers and ice caps
The water cycle is driven by – ANSWER- solar energy and gravity.
When a cloud forms water vapor condenses – ANSWER- which releases
heat
Which of the following processes absorb heat and release water vapor to
the atmosphere? – ANSWER- Both evaporation and transpiration absorb
heat to convert liquid water to water vapor.
Condensation is a phase change from – ANSWER- gas to liquid.
Evaporation is a phase change from – ANSWER- liquid to gas.
Rain falls back toward Earth’s surface because of – ANSWER- gravity