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WX 201 TEST 2 ERAU STUDY GUIDE
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WX 201 TEST 2 ERAU STUDY GUIDE
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WX 201 TEST 2 ERAU STUDY GUIDEStation pressure - Answers-the actual air pressure computed at the observing station
Sea level pressure - Answers-the standard level of pressure 29.92 inches
Ideal gas law - Answers-the relationship PV=nrt, which describes the behavior of an
ideal gas
Mercury barometer - Answers-consists of a glass tube open at the bottom end and
partially filled with mercury
Barometric pressure - Answers-the pressure due to the weight of the atmosphere; also
called air pressure or atmospheric pressure
Aneroid barometer - Answers-An instrument that measures changes in air pressure
without using a liquid.
-Measured in millibars
Barograph - Answers-An instrument that registers graphically and continuously the
atmospheric pressure.
Pressure gradient force - Answers-the amount of pressure change occurring over a
given distance
Hydrostatic equation - Answers-pressure drops more rapidly with increasing height at
high latitudes and lowers the height of 500 mb level.
Coriolis force - Answers-The apparent force, resulting from the rotation of the Earth, that
deflects air or water movement.
Friction - Answers-A force that opposes motion between two surfaces that are in contact
Planetary boundary layer - Answers-is the lowest part of the atmosphere. Its behavior is
directly influenced by its contact with a planetary surface
Geostrophic flow - Answers-A current in the atmosphere in which the Coriolis force and
the pressure gradient are in balance.
Gradient flow - Answers-associated to a functional on a manifold which has a geometric
interpretation, usually associated with some extrinsic or intrinsic curvature.
Anticyclone - Answers-A high-pressure center of dry air
Cyclones - Answers-winds around centers of low atmospheric pressure bad storm
, Troughs - Answers-low points on a wave
Ridges - Answers-Vertical lines running the length of the natural nail plate, usually
related to normal aging.
Wind vane - Answers-measures wind direction
Anemometer - Answers-An instrument used to measure wind speed
Aerovane - Answers-a wind instrument that indicates or records both wind speed and
wind direction
Evaporation - Answers-Liquid to gas
Condensation - Answers-gas to liquid
Saturation - Answers-A condition of the atmosphere in which the rates of evaporation
and condensation are equal
Sublimation - Answers-solid to gas (s)
Deposition - Answers-gas to solid
Humidity - Answers-the amount of water vapor in the air
Vapor pressure - Answers-the pressure exerted by a vapor over a liquid
Saturation vapor pressure - Answers-Maximum amount of water air will hold (warm air
hold more water than cold air)
Absolute humidity - Answers-mass of water vapor in a given volume of air
Specific humidity - Answers-noun. The ratio of the mass of water vapor in air to the total
mass of the mixture of air and water vapor.
Saturation specific humidity - Answers-the specific humidity of water vapor
corresponding to the saturation mixing ratio
Mixing ratio - Answers-the mass of water vapor in a unit of air compared to the
remaining mass of dry air
Saturation mixing ratio - Answers-maximum possible mixing ratio
Relative humidity - Answers-the percentage of water vapor in the air compared to the
maximum amount the air could hold
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