Atmospheric Structure and Mechanics Flashcards
In which atmospheric layer does weather normally occur?
Troposphere
The stratosphere is characterized by smooth flying conditions and excellent ______.
Visibility
What is the standard sea level temperature in degrees Celsius (° C)?
15°
With a pressure change of 1.0 in – Hg, how many feet will the altimeter reading change?
1000
If the air is colder than the standard atmosphere, the aircraft will be ______ than the altimeter indicates?
Lower
What is the initiating force for all winds?
Pressure gradient force
Low pressure results from ______ air.
Ascending
The jet stream is the narrow band of strong winds found below the ______.
Tropopause
What type of clouds contain numerous hazards such as severe to extreme turbulence, hail, icing, and lightning?
Cumulonimbus
Three forms of precipitation are ______, ______, and ______.
Drizzle, rain, frozen
The four methods of atmospheric lifting are convergence, frontal, thermal, and ______.
Orographic
______ defines air with the same temperature as the surrounding air after being lifted.
Neutrally stable
A weak pressure gradient force would be indicated by a ______ isobar spacing?
Wide
A condition where the air temperature aloft is higher than that of the lower atmosphere is generally referred to as a temperature ______.
Inversion
The forces that determine the wind direction in the atmosphere are weakened at the Earth’s surface by the force of ______.
Friction
The height of an aircraft above the ground is known as _____ altitude.
Absolute
Air is ______ when it contains the maximum moisture possible for a given temperature.
Saturated
The decrease in atmospheric temperature with increasing altitude is called what?
Lapse rate
Below 2000 feet AGL, ______ reduces the speed of the wind.
Friction
Standard sea level pressure is 1013.2 mb or ______ in Hg.
29.92
Names of middle clouds contain the prefix ______.
Alto-
What is the standard temperature lapse rate of the atmosphere in °Celsius per 1000 feet?
2.0
Lifted air that is warmer than surrounding air continues to rise and indicates a(n) ______ condition.
Unstable
For every 11° C the temperature varies from the standard, there will be a ______% altimeter error.
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