Air Traffic Basics Lp 22

Front 1

__________ is the lowest layer of the earths atmopshere.

Back 1

Troposphere

Front 2

An increase in temperature with altitude is normally defined as ______

Back 2

an inversion

Front 3

The transition between the troposphere and the stratosphere is called ______

Back 3

the tropopause

Front 4

In the Stratosphere Temperature _________ with altitude

Back 4

increases

Front 5

What is the most stable layer, generally devoid of signifcant weather?

Back 5

Stratosphere

Front 6

Four things standard atmosphere is used for:

Back 6

Pressure altitmeter calibrations,
aircraft performance calculations,
aircraft design
weather-related processes

Front 7

Decrease of temperature with height is called what?

Back 7

Lapse rate

Front 8

Generally what is the lapse rate in the troposphere?

Back 8

2 degrees per 1000 feet

Front 9

________ is relatively strong wings concentrated within a narrow horizontal band in the upper troposphere

Back 9

Jet stream

Front 10

Two jet streams are:

Back 10

Polar & subtropical

Front 11

_____ is often produced in jet streams

Back 11

CAT Clear air Turbulence

Front 12

What is the value of sea level pressure in the standard atmosphere?

Back 12

29.92 of mercury

Front 13

_______ is water in the invisible gaseous form

Back 13

Water vapor

Front 14

______ is the change of liquid water to water vapor

Back 14

Evaporation

Front 15

_________ is the change of ice to water vapor

Back 15

sublimation

Front 16

Water vapor is the raw material for clouds and precipitation. It constitutes for ___ % of the volume

Back 16

4 %

Front 17

______ A measure of the hotness or coldness of the air

Back 17

Temperature

Front 18

What kind of air can hold more water vapor?

Back 18

Warm air

Front 19

________ is the maximum possible quantity of water vapor that a parcel of air can hold at any given temperature and pressure

Back 19

Saturation

Front 20

________ is The temperature to which a given parcel of air must be cooled at constant pressure and constant water-vapor content in order for saturation to occur

Back 20

Dew Point

Front 21

_____is the ratio of water vapor actually in the air

Back 21

Relative humidity

Front 22

_______ is the change of water vapor to liquid water

Back 22

Condensation

Front 23

When the spread (temp&dewpoint) decreases to zero, air becomes saturated and condensation will form ____, ______, _______

Back 23

dew, fog, or clouds

Front 24

What time of day is dew or fog most likely to form

Back 24

Sunrise

Front 25

______ a visible mass of tiny water droplets and or ice particles in the atmosphere above the earth

Back 25

Cloud

Front 26

When do clouds form

Back 26

When air is cooled to its dew point and becomes saturated

Front 27

A parcel of rising air ______ and ______ as pressure decreases with altitude

Back 27

Expands and cools

Front 28

A parcel of sinking air ____ as it encounters increasing pressure and is compressed

Back 28

Warms

Front 29

High level, Whispy, Thin clouds

Back 29

Cirriform

Front 30

Fluffy, large, clouds

Back 30

Cumuliform

Front 31

Blanket like, little to no turbulence, featurless low layer that covers the sky

Back 31

Stratiform

Front 32

The prefix and suffix Nimbo/Nimbus means?

Back 32

Raincloud

Front 33

_____ is air in motion relative to the surface of the earth

Back 33

Wind

Front 34

A High pressure system has what characteristics

Back 34

Air flow diverge clockwise and sinks

Front 35

A low pressure system has what characteristics

Back 35

Air flow converges in a counterclockwise motion and rises

Front 36

______is large body of air that has similar horizontal temperature and moisture characteristics

Back 36

Air mass

Front 37

______ is a region where air masses orginate and acquire their properties of temp and moister

Back 37

Air mass source region

Front 38

List the three temp properties of air masses

Back 38

A - Arctic
P - Polar
T- Tropical

Front 39

List the two moisture properties of air masses

Back 39

c - Continental
m - Maritime

Front 40

Cold are mass moving over a warm surface often produces ______ air

Back 40

Unstable

Front 41

Warm air mass moving over a cold surface often produces _______ air

Back 41

Stable

Front 42

_______ is a boundary of transition zone between two air masses of different density, and thus (usually) different temperature

Back 42

Front

Front 43

Two ways a front can be detected

Back 43

Temperature difference and Pressure typically decreases as a front approaches and increases as it passes

Front 44

What type of front is associated with cumulus clouds, showers and T stroms in the front, good visibility and turbulence

Back 44

Cold front

Front 45

What type of front is associated with stratiform cloudiness and precipitation, poor visability , smooth air

Back 45

warm front

Front 46

What type of front is two when a front undercuts the retreating cold air mass associated with the warm front

Back 46

Occluded front

Front 47

What type of front is when the boundary between two air masses generally dont move

Back 47

Stationary

Front 48

_______ is any of the forms of water particles that fall from the sky

Back 48

precipitation

Front 49

Precipitation needs three things:

Back 49

Water vapor, Lift, Growth Process

Front 50

_____ is precip of snow crystrals

Back 50

Snow (SN)

Front 51

_______ is precip of transparent or translucent pellets of ice (5 mm in size)

Back 51

Ice Pellet (PL)

Front 52

PL is formed when:

Back 52

Inversion, thick cold layer based at the surface

Front 53

______ is rain that freezes on contact with the ground or exposed objects

Back 53

Freezing rain (FZRA)

Front 54

FZRA is formed when:

Back 54

Inversion, and thin Cold layer based at the surface

Front 55

_____ is precip 0.5mm or smaller drops from the sky

Back 55

Rain (RA)

Front 56

NWS stand for

Back 56

National Weather Service

Front 57

How many weather forecast offices are across the US

Back 57

122

Front 58

The NWS issue 4 products

Back 58

AIRMETS, SIGMETS, CONVECTIVE SIGMETS, and TAFs

Front 59

______ are NWS offices in every ARTCC

Back 59

CWSUs Center Weather Service Units