Structure of the Atmosphere: MCQ Test (25 questions)

Question 1 of 25

What is the approximate height of the troposphere above the ground?

A8 km.
B14 km.
C18 km.
D22 km.

Question 2 of 25

Normal air pressure is found in-

Aon the mountains
Bin the desert
Con the seabed
D5 km above the surface

Question 3 of 25

Which atmospheric layer is known as the "ceiling of seasonal change"?

Astratosphere
BTroposphere
CIonosphere
Dmesosphere

Question 4 of 25

Temperature in the troposphere or atmosphere

Adecreases with height
Bincreases with altitude
Cremains unchanged
Dfirst decreases then increases

Question 5 of 25

Aeroplanes usually fly in ………….

ATroposphere
Bstratosphere
Cmesosphere
Dexosphere

Question 6 of 25

Which of the following atmospheric layers absorbs the ultraviolet rays of the Sun?

ATroposphere
Bstratosphere
CIonosphere
Dozone layer

Question 7 of 25

In which layer of the atmosphere is most of the atmospheric ozone found?

AThermosphere
BTroposphere
Cstratosphere
Dmesosphere

Question 8 of 25

Where is the highest concentration of ozone in the atmosphere?

AIonosphere
Bmesosphere
Cstratosphere
DTroposphere

Question 9 of 25

Which part of the atmosphere is a part of the chemical sphere?

AThermosphere
BIonosphere
CTroposphere
Dozone layer

Question 10 of 25

Which is the correct order of boundaries of different layers of the atmosphere from top to bottom?

AMagnetopause, Mesopause, Stratopause, Tropopause
BMesopause, Stratopause, Tropopause, Magnetopause
CTropopause, Stratopause, Mesopause, Magnetopause,
DStratopause, Tropopause, Magnetopause, Mesopause,

Question 11 of 25

The troposphere is the hottest layer of the atmosphere because-

AIt is closest to the Sun
BIt has a charged particle
CIt is heated by the Earth's surface
DIt produces heat

Question 12 of 25

Which of the following statements is false?

AThe upper limit of the atmosphere is about 10,000 km high.
B50 percent of the atmosphere is confined to a height of 5.6 km.
CThe amount of water vapor increases with increase in altitude
DThe lower layers of the atmosphere are dominated by heavier gases and the upper layers by lighter gases.

Question 13 of 25

What is the percentage of nitrogen in the air?

A0.94
B0.03
C78.03
D85.02

Question 14 of 25

In which layer of the atmosphere does the temperature not fluctuate much?

AStratosphere
BTroposphere
Cexosphere
Dthermosystem

Question 15 of 25

Which gas in the atmosphere protects us from being burnt by the intense rays of the sun?

Aoxygen
Bnitrogen
Cozone
DOrgan

Question 16 of 25

The expansion of the doldrum belt is generally found in-

A0⁰ -5⁰ Answer
B0⁰ -5⁰ South
C0⁰ -10⁰ Answer
D5⁰ North -5⁰ South

Question 17 of 25

The stratosphere is considered ideal for the flight of jet planes because -

AOzone present in this layer reduces fuel consumption.
BThe temperature in this layer remains even, which is a favorable condition for fuel efficiency.
CThis layer is beyond the range of anti-aircraft weapons.
DThere are no clouds or other weather phenomena in this layer.

Question 18 of 25

What is the atmospheric layer farthest from the Earth's surface called?

Amesosphere
Bstratosphere
Cexosphere
DIonosphere

Question 19 of 25

Which gas is found in maximum quantity in the atmosphere?

Aoxygen
Bhydrogen
Cnitrogen
Dcarbon dioxide

Question 20 of 25

The doldrums region is characterized by

Alow pressure and air subsidence
Blow pressure and gentle easterly wind
Cnormal pressure and depression of air
Dlow pressure and calm winds

Question 21 of 25

Up to how many latitudes does the equatorial low pressure belt extend on both sides of the equator?

A5⁰
B10⁰
C15⁰
D20⁰

Question 22 of 25

Consider the following constituent gases of the atmosphere - 1. Argon 2. Neon 3. Helium 4. Carbon dioxide Which of the following is the correct ascending order of the above gases in terms of percentage by volume?

A3-2-4-1
B1-4-2-3
C4-2-3-1
D2-4-1-3

Question 23 of 25

What percentage of the Earth's atmosphere is found up to a height of 29 km?

A0.29
B0.57
C0.76
D0.97

Question 24 of 25

Which is the lowest layer in the vertical structure of the atmosphere?

Astratosphere
Bmesosphere
Ctroposphere
Dthermosphere

Question 25 of 25

Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?

Asulfur dioxide
Bnitrous oxide
Ccarbon dioxide,
Dchlorofluorocarbon