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Geography 1900 Exam 3 with precise detailed solutions

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Geography 1900 Exam 3 with precise detailed solutions

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Geog 1900
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Geog 1900










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Institution
Geog 1900
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Geog 1900

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Uploaded on
September 3, 2025
Number of pages
17
Written in
2025/2026
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Geography 1900 Exam 3 with accurate ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




detailed solutions ||//\\||




The difference between PGF and wind - correct answer✔✔-PGF = an important cause of
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




movement in the atmosphere (such as winds) and the oceans (waves/currents), moves ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




air from areas of HP to LP
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Winds: horizontal movement of air CAUSED by PGF, wind is the motion caused by the ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




movement from HP to LP ||//\\|| ||//\\|| ||//\\|| ||//\\||




What causes the Coriolis effect? - correct answer✔✔-Deflection of the path of an object
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




that moves within a rotating coordinate system. The object does not actually deviate from
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




its path, but it appears to do so because of the motion of the coordinate system
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Effects of rotation on movement observed from the rotating frame of reference ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-So the moment air moves, it is deflected
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-It deflects movement because of earth's rotation
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How does the Coriolis influence movement in the northern and southern hemispheres? -
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




correct answer✔✔-To the right in the northern hemisphere and to the left in the southern ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




hemisphere


What influences the magnitude of the Coriolis effect? - correct answer✔✔-The intensity of
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




the deflection is:
||//\\|| ||//\\|| ||//\\||




1. Proportional to speed of movement --> no deflection is felt by non-moving objects
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




2. Is zero at the equator and increases with latitude for a maximum value at the poles
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




3. For wind and currents on earth it is important for movement covering at least a few km
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




and lasing many hours ||//\\|| ||//\\|| ||//\\||

,The distribution of pressure over space and the direction of the geostrophic flow and the
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




surface flow associated with it - correct answer✔✔-There is a 90 degree angle between ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




the PGF and the actual flow of wind
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Flow will not be accelerated because no resulting force is acting on the flow
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Geostrophic balance: the Coriolis force and PGF balance each other out --> upper level ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




winds are close to this ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-PGF forces from HP to LP (from poles to equator) --> north pole moves south to the
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




equator, south poles moves north to the equator ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




What are the forces responsible for generating this geostrophic flow and their positions in
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




relationship to the flow? - correct answer✔✔-PGF ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Coriolis force ||//\\||




-Gradient winds caused by isotherms not being complete straight ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Surface winds - correct answer✔✔-Winds effect by PGF and Coriolis force, but also ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




friction
-Surface winds will not flow from HP to LP ---> deflected to the right but not as much as ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




geostrophic winds or gradient winds ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Surface winds are also affected by friction with the surface and are sometimes deflected ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




in different directions
||//\\|| ||//\\||




What causes and what are the adiabatic changes in temperature experienced by an air
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




parcel moving vertically in the atmosphere? - correct answer✔✔-As air heats up, its
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




density decreases and starts to rise ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-As it rises, pressure decreases and therefore it can expand
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Why is the lifting of air parcels associated with cloud formation? - correct answer✔✔-
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Cloud formation is the result of upward movement which results in adiabatic cooling and
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




condensation of water vapor (when RH = 100%) ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||

, How the vertical rate of pressure decrease differ between warm and cold air columns in
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




the atmosphere and how these differences can lead to horizontal pressure gradients with
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




elevation. What does this mean for the general direction of the pressure gradient force at ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




upper levels of the atmosphere given the mean latitudinal distribution of temperature -
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




correct answer✔✔-As pressure decreases so does the vertical pressure gradient ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Warm column: the rate of pressure decrease is smaller in the warmer column --> you
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




have to move highter up in the column to reach the same pressure as a cold air column
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Atmosphere is taller over the equator, shorter over the poles ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Microscale - correct answer✔✔A few hundred meters and below, hours and belos ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Mesoscale - correct answer✔✔A few km to many hundreds of km, many minutes to many ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




hours
||//\\||




Synoptic - correct answer✔✔A few thousand km, days to 2 weeks ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Global - correct answer✔✔Several thousand km, up to many weeks ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




What is the driving force of the global-scale circulation? - correct answer✔✔The pole-to-
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




equator temperature and pressure gradients ||//\\|| ||//\\|| ||//\\|| ||//\\||




Global-scale circulation - no rotation - correct answer✔✔-If the earth had no continents ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




and did not rotate it would act much like a radiator at home --> a convection cell would
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




take warm air from the equator to the poles where it would cool, cool air would fall back
||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




down and warm, and the process would begin again ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




-Surface flow would be from the poles to the equator ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




Global-scale circulation - rotation - correct answer✔✔-We need to take into account the ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\|| ||//\\||




effects of rotation ||//\\|| ||//\\||




-Three pairs of atmospheric cells ||//\\|| ||//\\|| ||//\\|| ||//\\||

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