Structure of the Atmosphere: MCQ Test (50 questions)

Question 1 of 50

The expansion of the doldrum belt is generally found in-

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

Question 2 of 50

Temperature in the troposphere or atmosphere

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

Question 3 of 50

Which is the inert gas present in the largest quantity in the atmosphere?

AOrgan
Bkrypton
Chelium
DNeon

Question 4 of 50

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

A6 km.
B8 km.
C12 km.
D18 km.

Question 5 of 50

Which gas is found in maximum quantity in the atmosphere?

Aoxygen
Bhydrogen
Cnitrogen
Dcarbon dioxide

Question 6 of 50

The atmosphere is mainly heated by?

Afrom direct sunlight
Bby radiation from the Earth
Cfrom the heat inside the Earth
Dfrom the friction of the Earth's motion

Question 7 of 50

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

Astratosphere
BTroposphere
CIonosphere
Dmesosphere

Question 8 of 50

Normal air pressure is found in-

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

Question 9 of 50

Which of the following statements is not correct regarding the mesosphere?

AMeteorites burn up upon entering this layer from space.
BIn this layer, the temperature increases rapidly with increasing altitude.
CThis is the third layer of the atmosphere.
DIt is directly above the stratosphere

Question 10 of 50

In which season does the height of the troposphere increase?

AWinter season
BSummer season
CRainy season
DNone of these

Question 11 of 50

Which is the layer of the atmosphere that reflects radio waves?

AIonosphere
BTroposphere
Cstratosphere
Dexosphere

Question 12 of 50

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

A5⁰
B10⁰
C15⁰
D20⁰

Question 13 of 50

Which of the following statements is true?

AThe increase and decrease of air pressure is called "air pressure gradient".
BThe fluctuations in air pressure decrease from the equator towards the poles.
C60 Diurnal fluctuations in air pressure are not observed beyond latitude
Dall of the above

Question 14 of 50

Which of the following zones is also called the convective zone?

ATroposphere
BStratosphere
CIonosphere
DMadhyamandal

Question 15 of 50

Which of the following indicates the increasing amount of gases in the atmosphere?

AOzone, carbon dioxide, oxygen, nitrogen
BNitrogen, oxygen, carbon dioxide, ozone,
CCarbon dioxide, ozone, oxygen, nitrogen
DArgon, nitrogen, oxygen, carbon dioxide

Question 16 of 50

The troposphere is the lower layer of the atmosphere whose height at the equator is-

Aup to 10 miles
Bup to 9 miles
Cup to 6 miles
Dup to 4 miles

Question 17 of 50

What is the percentage of nitrogen in the air?

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

Question 18 of 50

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

Asulfur dioxide
Bnitrous oxide
Ccarbon dioxide,
Dchlorofluorocarbon

Question 19 of 50

What is the correct descending order of the following gases found in the Earth's atmosphere? 1. Nitrogen 2. Carbon dioxide 3. Oxygen 4. Argon 5. Neon

A1,3,2,4,5
B1,3,2,5,4
C1,3,4,2,5
D1,2,3,5,4

Question 20 of 50

Which of the following statements regarding the stratosphere is false?

AThe stratosphere extends up to a height of 50 km.
BThe stratosphere borders the ionosphere
CThere is a lack of clouds in this zone.
DThe amount of dust particles and water vapor is very less in this zone.

Question 21 of 50

What is the average air pressure at sea level?

A1003.25 millibars
B1013.25 millibars
C1023.25 millibars
D1034.25 millibars

Question 22 of 50

Which of the following statements is true?

AAir pressure is maximum at sea level
BAir pressure is measured in millibars (mb)
CAt any place, the air pressure increases twice and decreases twice.
Dall of the above

Question 23 of 50

What is the transition region between the troposphere and the stratosphere called?

Aisothermal boundary
Btropopause
Cmiddle range
Douter limit

Question 24 of 50

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

Astratosphere
Bmesosphere
Ctroposphere
Dthermosphere

Question 25 of 50

In which part of the atmosphere does 90 percent of the total amount of water vapor exist?

AIonosphere
Bozone layer
CTroposphere
Dstratosphere

Question 26 of 50

Which of the following statements is correct regarding temperature?

AThe temperature in the stratosphere decreases with altitude
BThe temperature remains constant at different altitudes in the stratosphere
CTemperature in the troposphere 6.5increases with altitude at an average rate of ⁰C per km
DThe temperature in the troposphere decreases with altitude at an average rate of 6.4°C per km.

Question 27 of 50

Due to the depletion of the ozone layer at a rate of 7 percent per year, a large hole of 10 million square kilometers has formed in it. This hole is located in-

AOver the Arctic
BOver Antarctica
Cover the poles
Dover America and Europe

Question 28 of 50

A sudden drop in air pressure indicates which of the following?

Aclear weather
Bstormy weather
Cextremely cold weather
Drainy season

Question 29 of 50

The most stable element of the atmosphere is-

Anitrogen
Boxygen
CCO2
Dwater vapor

Question 30 of 50

Where do all the important atmospheric processes that change various climate and weather conditions occur?

Astratosphere
BExosphere
CIonosphere
DTroposphere

Question 31 of 50

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

Amesosphere
Bstratosphere
Cexosphere
DIonosphere

Question 32 of 50

What is the atmospheric layer found near the Earth called?

Atroposphere
Bstratosphere
Cionosphere
Dexosphere

Question 33 of 50

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

AStratosphere
BTroposphere
Cexosphere
Dthermosystem

Question 34 of 50

All the hot deserts of the world are located in which of the following belts?

Aequatorial low pressure belt
Bsubtropical high pressure belt
Csubpolar low pressure belt
Dpolar high pressure belt

Question 35 of 50

In which atmospheric layer are communication satellites located?

Astratosphere
BIonosphere
CTroposphere
DExosphere

Question 36 of 50

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 37 of 50

Which of the following layers is the upper limit of our atmosphere, extending from the top of the thermosphere to 1,000 km (6,200 mi)?

Aexosphere
Btropopause
Cmesosphere
Dionosphere

Question 38 of 50

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

AThermosphere
BTroposphere
Cstratosphere
Dmesosphere

Question 39 of 50

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 40 of 50

Air pressure is usually highest when the air is-

Acold and dry
Bcold and moist
Chot and dry
Dwarm and moist

Question 41 of 50

Where are jet streams usually found?

Ain the ozone layer
Bin the tropopause
Cin the mesosphere
Din the ionosphere

Question 42 of 50

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 43 of 50

Which of the following gases is responsible for the greenhouse effect?

Achlorine
BCO2
Coxygen
Dhydrogen

Question 44 of 50

Where is the Earth's atmosphere most dense?

ATroposphere
BStratosphere
CMadhyamandal
DIonosphere

Question 45 of 50

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 46 of 50

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 47 of 50

Choose the correct answer that shows the order of layers of the atmosphere?

AIonosphere, Voltosphere, Mesosphere, Stratosphere, Transformation
BTransformation, Stratosphere, Mesosphere, Ionosphere, Volumetric,
CVolosphere, Transformation, Ionosphere, Mesosphere, Stratosphere,
DMesosphere, Ionosphere, Stratosphere, Transformation, Ionosphere,

Question 48 of 50

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 49 of 50

In which layer of the ionosphere do short radio waves get reflected and reach the surface?

AD layer
BE layer
CF layer
DS layer

Question 50 of 50

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

ATroposphere
Bstratosphere
CIonosphere
Dozone layer