Structure of the Atmosphere: MCQ Test
50 questions · pick one option for each · submit when you finish to see your score and the correct answers.
Question 1 of 50
The calm belt is found on both sides of which line?
- AEquator
- BTropic of Cancer
- CCapricorn
- Darctic line
Question 2 of 50
Which of the following atmospheric layers absorbs the ultraviolet rays of the Sun?
- ATroposphere
- Bstratosphere
- CIonosphere
- Dozone layer
Question 3 of 50
Normal air pressure is found in-
- Aon the mountains
- Bin the desert
- Con the seabed
- D5 km above the surface
Question 4 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 5 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 6 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 7 of 50
Which gas in the atmosphere protects us from being burnt by the intense rays of the sun?
- Aoxygen
- Bnitrogen
- Cozone
- DOrgan
Question 8 of 50
Which of the following gases is responsible for the greenhouse effect?
- Achlorine
- BCO2
- Coxygen
- Dhydrogen
Question 9 of 50
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 10 of 50
What is the process called in which the temperature of the earth's atmosphere increases due to the absorption of infrared radiation reflected from the earth's surface?
- ATsunami
- Bsolar heating
- Cgreenhouse effect
- Dseismic effect
Question 11 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 12 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 13 of 50
The most stable element of the atmosphere is-
- Anitrogen
- Boxygen
- CCO2
- Dwater vapor
Question 14 of 50
The number of atmospheric layers present above the Earth is-
- A4
- B5
- C2
- D3
Question 15 of 50
A sudden drop in air pressure indicates which of the following?
- Aclear weather
- Bstormy weather
- Cextremely cold weather
- Drainy season
Question 16 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 17 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 18 of 50
In which season does the height of the troposphere increase?
- AWinter season
- BSummer season
- CRainy season
- DNone of these
Question 19 of 50
Where is the Earth's atmosphere most dense?
- ATroposphere
- BStratosphere
- CMadhyamandal
- DIonosphere
Question 20 of 50
Which part of the atmosphere is a part of the chemical sphere?
- AThermosphere
- BIonosphere
- CTroposphere
- Dozone layer
Question 21 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 22 of 50
Which is the inert gas present in the largest quantity in the atmosphere?
- AOrgan
- Bkrypton
- Chelium
- DNeon
Question 23 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 24 of 50
Which atmospheric layer is known as the "ceiling of seasonal change"?
- Astratosphere
- BTroposphere
- CIonosphere
- Dmesosphere
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
What is the average air pressure at sea level?
- A1003.25 millibars
- B1013.25 millibars
- C1023.25 millibars
- D1034.25 millibars
Question 27 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 28 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 29 of 50
What is the number of pressure belts on the globe?
- A5
- B6
- C7
- D9
Question 30 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 31 of 50
What is the atmospheric layer found near the Earth called?
- Atroposphere
- Bstratosphere
- Cionosphere
- Dexosphere
Question 32 of 50
What is the atmospheric layer farthest from the Earth's surface called?
- Amesosphere
- Bstratosphere
- Cexosphere
- DIonosphere
Question 33 of 50
In which layer of the atmosphere does the temperature not fluctuate much?
- AStratosphere
- BTroposphere
- Cexosphere
- Dthermosystem
Question 34 of 50
What is the percentage of nitrogen in the air?
- A0.94
- B0.03
- C78.03
- D85.02
Question 35 of 50
In which layer of the atmosphere is most of the atmospheric ozone found?
- AThermosphere
- BTroposphere
- Cstratosphere
- Dmesosphere
Question 36 of 50
What is the approximate maximum height of the troposphere above the ground?
- A6 km.
- B8 km.
- C12 km.
- D18 km.
Question 37 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 38 of 50
In which layer of the atmosphere does thunder occur?
- AIonosphere
- Bozone layer
- CTroposphere
- DStratosphere
Question 39 of 50
In which atmospheric layer are communication satellites located?
- Astratosphere
- BIonosphere
- CTroposphere
- DExosphere
Question 40 of 50
What is the transition region between the troposphere and the stratosphere called?
- Aisothermal boundary
- Btropopause
- Cmiddle range
- Douter limit
Question 41 of 50
Which is the layer of the atmosphere that reflects radio waves?
- AIonosphere
- BTroposphere
- Cstratosphere
- Dexosphere
Question 42 of 50
What is the main basis for dividing the atmosphere into layers like troposphere, stratosphere etc.?
- Atemperature
- BAir pressure
- COrganization
- Ddestiny
Question 43 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 44 of 50
Which is the lowest layer in the vertical structure of the atmosphere?
- Astratosphere
- Bmesosphere
- Ctroposphere
- Dthermosphere
Question 45 of 50
Air pressure is usually highest when the air is-
- Acold and dry
- Bcold and moist
- Chot and dry
- Dwarm and moist
Question 46 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 47 of 50
Temperature in the troposphere or atmosphere
- Adecreases with height
- Bincreases with altitude
- Cremains unchanged
- Dfirst decreases then increases
Question 48 of 50
Where is the highest concentration of ozone in the atmosphere?
- AIonosphere
- Bmesosphere
- Cstratosphere
- DTroposphere
Question 49 of 50
1 of the general decrease in the troposphere0C Each -
- A146 m. for the purpose
- B156 m. for the purpose
- Cfor 166 m
- Dfor 176 m
Question 50 of 50
Which layer is found above the troposphere in the atmosphere?
- Astratosphere
- Bmesosphere
- Cthermosphere
- Dexosphere