Atmosphere & Weather

Question 0

Atmosphere composed of % gases

Answer 0

78% Nitrogen
21% Oxygen
1% other (0.93% Argon)

Question 1

99% of the atmosphere lies within

Answer 1

19 miles of the Earths surface

Question 2

% for Nitrogen and Oxygen hold constant upto

Answer 2

about 50 miles

Question 3

Changing of water vapor into liquid water

Answer 3

Condensation

Question 4

Liquid water becoming water vapor

Answer 4

Evaporation

Question 5

Latent Heat

Answer 5

Released when water turns from Vapor to liquid water or ice

Question 6

Atmosphere Spheres

Answer 6

Troposphere
Stratosphere 
Mesosphere
Thermosphere
Exosphere

Question 7

Isothermal Zones

Answer 7

Region where the air remains constant with height

Question 8

Temperature decrease with height

Answer 8

Lapse rate

Question 9

Lapse Rate average

Answer 9

2*C per 1000 feet rise elevation

Question 10

Temperature Inversion

Answer 10

Temperature may increase with height

Question 11

Troposphere

Answer 11

From the earths surface to where the air stops becoming colder with height

Question 12

Jet Stream

Answer 12

Narrow, shallow band of strong westerly winds of 50 knots or more around the hemisphere in a wave like pattern

Question 13

Ozone

Answer 13

it absorbs energetic ultraviolet solar energy

Question 14

Hypoxia

Answer 14

oxygen starved, no pain, feeling of exhaustion, visual impairment, carelessness, unconsciousness and death.

Question 15

Exosphere

Answer 15

Region where atoms and molecules shoot off into space

Question 16

Weather Fronts

Answer 16

Cold, Warm, Occluded, Stationary

Question 17

Cold Front

Answer 17

Cold air mass overtaking warm air mass. Turbulence, wind shear,TS, lighting, heavy rain, hail, icing and tornados.

Question 18

Warm Front

Answer 18

Warm air mass overtaking and replacing a cold front. Low ceiling and poor visibility, freezing rain, ice. 6-12hrs prior to and 1hr afterwards.

Question 19

Occluded Front

Answer 19

Cold front overtakes a warm front and lifts it completely from the ground.

Question 20

Stationary Front

Answer 20

Warm or Cold front that just does not move.

Question 21

Most noticeable property of air

Answer 21

Mobility

Question 22

Winds on earth are impelled by 2 great forces

Answer 22

Heat of the sun

Rotation of the Earths axis

Question 23

Real sourest that drives the winds

Answer 23

The Sun

Question 24

Steering mechanism that drives the wind

Answer 24

Earths Rotation

Question 25

Jet stream wind

Answer 25

May reach up to 300 knots but generally between 100 and 150 knots. Strongest winds between FL250 and FL400

Question 26

Hydrologic Cycle

Answer 26

Water evaporates and condenses again falling down as precipitation in a never ending cycle

Question 27

most important element in the production of clouds and other visible weather phenomena

Answer 27

Water Vapor

Question 28

Absolute Humility

Answer 28

density of water vapor in the air.

Question 29

Relative Humidity

Answer 29

Ratio of the amount of water vapor actually in the air to the maximum amount that the air can hold at the temperature.

Question 30

Dew Point

Answer 30

is the temperature, at a given pressure, to which the air must be cooled to become saturated

Question 31

Frost Point

Answer 31

When the Dew Point is bellow freezing

Question 32

Spread

Answer 32

difference between the temperature and dew point

Question 33

4*F of the dew point

Answer 33

Aircrews should be alert for the possibility of fog or low cloud formation

Question 34

Atmospheric Pressure-Definition

Answer 34

the force per unit area exerted by the weight if a column of air directly above a given fixed point.

Question 35

Pressure Units

Answer 35

inches of mercury (Hg) millibars (mb) hectopascals (hPa)

Question 36

Kollsman Window

Answer 36

altimeters in the US aircraft are calibrated for settings in inches of mercury

Question 37

Station Pressure

Answer 37

Pressure measured at an airport, it's the weight of the air above the airport.

Question 38

MSL Pressure

Answer 38

1 inch of mercury for each 1000 feet of altitude change.

Question 39

Temperature

Answer 39

Air expands as it becomes warmer and contracts as it cools

Question 40

Pressure Altitude (PA)

Answer 40

standard atmosphere, sea level pressure 29.92 inches Hg or 1013.2 mb.

Question 41

Standard Datum Plane

Answer 41

29.92 in Hg 1013.2 mb 15*C

Question 42

Density Altitude

Answer 42

Is pressure altitude corrected for nonstandard temperature.

Question 43

QNE

Answer 43

always 29.92 Hg above the transition altitude FL180 MSL in the US

Question 44

QNH

Answer 44

True height above MSL

Question 45

QFE

Answer 45

DANGEROUS. | indicates actual elevation above the field. (will show ZERO feet on the ground)

Question 46

Altimeter Errors

Answer 46

Atmospheric pressure Mechanical Displacement Instrument Error