Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PPL Course - (3) Navigation and Meteorology > Chapter 8.2 - Atmospheric Fundamentals > Flashcards

Chapter 8.2 - Atmospheric Fundamentals Flashcards

1
Q

Name the two main atmosphere layers?

A
  • Troposphere.

- Stratosphere.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which atmosphere contains most of the weather?

A

Troposphere.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What happens with temperature in the Troposphere?

A

As height increases, temperature decreases.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What happens with temperature in the Stratosphere?

A

In the lower section, temperature remains close to constant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What’s the name of the boundary between the Troposphere and the Stratosphere?

A

Tropopause.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the average height of the Troposphere?

A

36 000ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

True or False. The Troposphere is equal size around the earth?

A

False. The Troposphere is smaller around the Equator than the North/South Poles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

True or False. The Troposphere contains all water vapour in the atmosphere?

A

True.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does ELR stand for?

A

Environmental Lapse Rate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Under average conditions where the temperature at sea level is 15°C, at what altitude will the air freeze (0°C)?

A

7500ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does ISA stand for?

A

International Standard Atmosphere.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the ISA MSL Pressure?

A

1013 hPa.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the ISA MSL Temperature?

A

+15°C.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the ISA Pressure Lapse Rate (2)?

A
  • 30 hPa per 1000ft.

- 1 hPa per 30ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the ISA Temperature Lapse Rate?

A

-2°C per 1000ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Name four ways heat transfer within the atmosphere?

A
  • Radiation.
  • Conduction.
  • Convection.
  • Advection.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The transfer of heat energy through space by electromagnetic waves from a hot body/substance to a cold body/substance is called what?

A

Radiation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The transfer of heat energy through contact from a hot body/substance to a cold body/substance is called what?

A

Conduction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The transfer of heat energy within a fluid (air) by movement of the fluid (air) itself is called what?

A

Convection.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the method where heat (energy) is transferred within the atmosphere by vertical movement of heated air?

A

Convection.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Name two types of weather phenomenon which are caused by Convection?

A
  • Turbulence.

- Cloud Formation/Rain.

22
Q

What is the method where heat (energy) is transferred within the atmosphere by horizontal movement of heated air?

A

Advection.

23
Q

Name two types of weather phenomenon which are caused by Advection?

A
  • Types of Cloud.

- Fog.

24
Q

The heat required to change states of matter from Solid to Liquid to Gas (and vice versa) with a constant temperature is called what?

A

Latent Heat.

25
Q

What is the name given to the process where a matter changes from Liquid to Gas?

A

Evaporation.

26
Q

What is the name given to the process where a matter changes from Gas to Liquid?

A

Condensation.

27
Q

What is the name given to the process where a matter changes from Liquid to Solid?

A

Freezing.

28
Q

What is the name given to the process where a matter changes from Solid to Liquid?

A

Melting.

29
Q

What’s the term called when temperature increases as height increases?

A

Temperature Inversion.

30
Q

Surface temperatures are at a minimum just after which period of the day?

A

Dawn.

31
Q

Surface temperatures are at a maximum at about which period of the day?

A

1500 LMT.

32
Q

What is a dry-bulb thermometer used for?

A

To measure ordinary air temperature.

33
Q

What is a wet-bulb thermometer used for?

A

To measure the amount of water vapour in the air.

34
Q

If humidity is high, what will the evaporation and temperature drop be?

A

Low.

35
Q

If humidity is low, what will the evaporation and temperature drop be?

A

High.

36
Q

The difference between the wet-bulb and dry-bulb temperature will give you the measurement of what?

A

Humidity in the air.

37
Q

When will the wet-bulb, dry-bulb and dew point temperature be equal?

A

If the relative humidity is close to 100%.

38
Q

True or False. The dry-bulb temperature is also used to measure the temperature of the air surrounding an Aircraft?

A

True.

39
Q

Atmospheric pressure at MSL is 1013 hPa which is equivalent to how many centimetres of mercury?

A

76.

40
Q

When two places have different MSL pressures, the pressure difference between them is known as what?

A

Horizontal Pressure Gradient.

41
Q

When QNH is set of the pressure-setting subscale of an Altimeter, this will indicate what?

A

Altitude.

42
Q

When an Aircraft is on the ground, the QNH can be found by setting the Altimeter to read what?

A

Elevation of the aerodrome.

43
Q

How does wind affect the rate of evaporation?

A

The stronger the wind, the higher the rate of evaporation.

44
Q

What is Saturated Air?

A

When the air contains the maximum amount of water vapour at a given temperature.

45
Q

Relative Humidity is expressed as what?

A

Percentage (%).

46
Q

Relative Humidity is the ratio between what?

A

Amount of water vapour in the air to the maximum amount of water vapour the air can hold at that temperature.

47
Q

For cloud to form, condensation must occur, for condensation to occur, the relative humidity must be what?

A

100%.

48
Q

Define Dew-point Temperature?

A

The temperature at which the air can no longer hold all water vapour.

49
Q

The Dew-point Temperature is a common indicator of what?

A

Atmospheric Moisture/Humidity.

50
Q

Why is the Dew-point Temperature extremely important in aviation meteorology?

A

It is the best indicator for fog formation and the height of clouds to form.

51
Q

If temperature is constant, what will happen to density and pressure?

A

Density will increase as the pressure increases.

52
Q

If pressure is constant, what will happen to density and temperature?

A

Density will decrease as the temperature increases.

PPL Course - (3) Navigation and Meteorology (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions