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,50.01. THE ATMOSPHERE
50.01.01. Composition, extent, vertical division
50.01.01.01. Composition, extent, vertical division
1 How does the height of the tropopause normally vary with latitude in the northern
id 120 hemisphere ?
a It remains constant throughout the year.
b It remains constant from north to south.
c It increases from south to north.
d It decreases from south to north.
2 What, approximately, is the average height of the tropopause over the equator ?
id 121
a 40 km
b 8 km
c 11 km
d 16 km
3 In which layer is most of the atmospheric humidity concentrated ?
id 122
a Troposphere.
b Tropopause.
c Stratosphere.
d Stratopause.
4 What is the boundary layer between troposphere and stratosphere called?
id 1157
a Tropopause.
b Ionosphere.
c Stratosphere.
d Atmosphere.
5 Which of the following cloud types can project up into the stratosphere?
id 1495
a Cumulonimbus
b Cirrostratus
c Altocumulus
d Altostratus
6 Which one of the following statements applies to the tropopause?
id 1496
a It is, by definition, a temperature inversion
b It is, by definition, an isothermal layer
c It indicates a strong temperature lapse rate
d It separates the troposphere from the stratosphere
50.01. THE ATMOSPHERE 2002/12/22 Page 2 of 207
, 7 The thickness of the troposphere varies with
id 2069
a latitude
b longitude
c rotation of the earth
d the wind
8 What is the approximate composition of the dry air by volume in the troposphere ?
id 2088
a 21 % oxygen, 78 % nitrogen, and the rest other gasses
b 10 % oxygen, 89 % nitrogen, and the rest other gasses
c 88 % oxygen, 9 % nitrogen, and the rest other gasses
d 50 % oxygen, 40 % nitrogen, and the rest other gasses
9 Which layer of the atmosphere contains more than 90 per cent of all water vapour?
id 2381
a Troposphere
b Lower stratosphere
c Upper stratosphere
d Ionosphere
10 Going from the equator to the north pole, the altitude of the tropopause
id 2560
a increases and its temperature increases
b decreases and its temperature increases
c increases and its temperature decreases
d decreases and its temperature decreases
11 The troposphere is the
id 3592
a part of the atmosphere above the stratosphere
b part of the atmosphere below the tropopause
c boundary between the mesosphere and thermosphere
d boundary between the stratosphere and the mesosphere
12 The tropopause is a level at which
id 3593
a vertical currents are strongest
b water vapour content is greatest
c pressure remains constant
d temperature ceases to fall with increasing height
13 The tropopause is lower
id 3594
a south of the equator than north of it
b in summer than winter in moderate latitudes
c over the North Pole than over the equator
d over the equator than over the South Pole
50.01. THE ATMOSPHERE 2002/12/22 Page 3 of 207
, 14 The average height of the tropopause at 50°N is about
id 3598
a 14 km
b 8 km
c 11 km
d 16 km
15 The height and the temperature of the tropopause are respectively in the order of
id 3599
a 8 km and -40°C over the equator
b 16 km and -75°C over the equator
c 8 km and - 75°C over the poles
d 16 km and -40°C over the poles
16 The troposphere
id 4164
a has a greater vertical extent above the equator than above the poles
b contains all oxygen of the stratosphere
c is the separation layer between the stratosphere and atmosphere
d reaches the same height at all latitudes
17 In the mid-latitudes the stratosphere extends on an average from
id 5556
a 85 to more than 200 km
b 0 to 11 km
c 50 to 85 km
d 11 to 50 km
18 A temperature increase with altitude through a layer is called:
id 6406
a Heating aloft.
b An inversion.
c An extension.
d Unstable air.
19 The layer of the Earth´s atmosphere which most concerns aviators is called the:
id 6457
a Stratosphere.
b Tropopause.
c Troposphere.
d Equatorial zone.
20 The percentage concentration of gases in the atmosphere is constant from the
id 6462 surface of the earth to a certain altitude with the exception of:
a Oxygen
b Nitrogen
c Hydrogen
d Water vapour
50.01. THE ATMOSPHERE 2002/12/22 Page 4 of 207
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