AMERICAN MILITARY UNIVERSITY GEOG 101
EXAM PREP 2026 PRACTICE SOLUTION STUDY
GUIDE
◉ In January, the thermal equator
- is not influenced by continentality.
- trends northward over all ocean basins.
- shows the greatest variability over oceans.
- trends southward into the interior of South America and Africa
- peaks in the interior of Eurasia. Answer: trends southward into the
interior of South America and Africa
◉ Which of the following is true of thermohaline circulation?
- They are largely wind driven.
- They are deep currents caused by differences in temperature and
salinity.
- The circulation has a definitive beginning and end, at the equator
and poles, respectively.
- Due to their depths, they carry limited volumes of water.
,- They travel at greater speeds than surface currents.. Answer: They
are deep currents caused by differences in temperature and salinity.
◉ The diameter of Earth is largest when measured around the
- prime meridian
- International Date Line.
- Equator.
- subtropics.
- poles.. Answer: Equator
◉ What type of feedback maintains stability in a system; i.e., what
type of feedback keeps a system functioning properly by
discouraging change?
- neutral
- tipping point
- threshold
- negative
- positive. Answer: negative
◉ On its way to Earth, the solar wind first encounters
,- the homosphere.
- the troposphere.
- the ozonosphere.
- the magnetosphere.
- Earth's surface.. Answer: the magnetosphere.
◉ Which of the following is true regarding ozone depletion in
Antarctica?
- Maximum ozone depletion occurs during the Antarctic spring,
following the development of polar stratospheric clouds in winter. --
An actual decrease in ultraviolet levels has been measured at the
surface—which is contrary to what is predicted by ozone depletion
models.
- Increasing levels of ultraviolet radiation have not actually been
measured at this time.
- The atmosphere above Antarctica has experienced a complete loss
of protective ozone.
- Antarctic ozone depletion is less than Antarctic ozone depletion..
Answer:
◉ Which of the following is not true?
, - Some of Earth's atmospheric constituents, such as water vapor and
carbon dioxide, absorb certain wavelengths of terrestrial radiation.
- Earth radiates only a fraction of the energy it absorbs.
- Earth emits longer wavelengths concentrated around 10.0 μm
wavelengths.
- The sun emits shorter wavelengths concentrated around 0.5 μm
wavelengths.
- The sun emits shorter wavelength energy than Earth.. Answer:
Earth radiates only a fraction of the energy it absorbs.
◉ The Gulf Stream
- creates a warming effect on Japan and the Aleutians.
- moves northward in the western Atlantic, moderating
temperatures in Iceland.
- moves equatorward, warming the California coast.
- is a cold ocean current with minimal evaporation.
- moves southward and moderates temperatures in eastern South
America.. Answer: moves northward in the western Atlantic,
moderating temperatures in Iceland.
◉ The area of conflict between colder and warmer air masses in the
subpolar region
EXAM PREP 2026 PRACTICE SOLUTION STUDY
GUIDE
◉ In January, the thermal equator
- is not influenced by continentality.
- trends northward over all ocean basins.
- shows the greatest variability over oceans.
- trends southward into the interior of South America and Africa
- peaks in the interior of Eurasia. Answer: trends southward into the
interior of South America and Africa
◉ Which of the following is true of thermohaline circulation?
- They are largely wind driven.
- They are deep currents caused by differences in temperature and
salinity.
- The circulation has a definitive beginning and end, at the equator
and poles, respectively.
- Due to their depths, they carry limited volumes of water.
,- They travel at greater speeds than surface currents.. Answer: They
are deep currents caused by differences in temperature and salinity.
◉ The diameter of Earth is largest when measured around the
- prime meridian
- International Date Line.
- Equator.
- subtropics.
- poles.. Answer: Equator
◉ What type of feedback maintains stability in a system; i.e., what
type of feedback keeps a system functioning properly by
discouraging change?
- neutral
- tipping point
- threshold
- negative
- positive. Answer: negative
◉ On its way to Earth, the solar wind first encounters
,- the homosphere.
- the troposphere.
- the ozonosphere.
- the magnetosphere.
- Earth's surface.. Answer: the magnetosphere.
◉ Which of the following is true regarding ozone depletion in
Antarctica?
- Maximum ozone depletion occurs during the Antarctic spring,
following the development of polar stratospheric clouds in winter. --
An actual decrease in ultraviolet levels has been measured at the
surface—which is contrary to what is predicted by ozone depletion
models.
- Increasing levels of ultraviolet radiation have not actually been
measured at this time.
- The atmosphere above Antarctica has experienced a complete loss
of protective ozone.
- Antarctic ozone depletion is less than Antarctic ozone depletion..
Answer:
◉ Which of the following is not true?
, - Some of Earth's atmospheric constituents, such as water vapor and
carbon dioxide, absorb certain wavelengths of terrestrial radiation.
- Earth radiates only a fraction of the energy it absorbs.
- Earth emits longer wavelengths concentrated around 10.0 μm
wavelengths.
- The sun emits shorter wavelengths concentrated around 0.5 μm
wavelengths.
- The sun emits shorter wavelength energy than Earth.. Answer:
Earth radiates only a fraction of the energy it absorbs.
◉ The Gulf Stream
- creates a warming effect on Japan and the Aleutians.
- moves northward in the western Atlantic, moderating
temperatures in Iceland.
- moves equatorward, warming the California coast.
- is a cold ocean current with minimal evaporation.
- moves southward and moderates temperatures in eastern South
America.. Answer: moves northward in the western Atlantic,
moderating temperatures in Iceland.
◉ The area of conflict between colder and warmer air masses in the
subpolar region
