Consider the following statements regarding the structure of the atmosphere: I. The average height of the troposphere is higher nearer the poles than at the equator. II. The mesosphere contains the ozone layer. III. Radio waves transmitted from the Earth are reflected to the Earth by the ionosphere. IV. In the mesosphere, temperature decreases with an increase in altitude. Which of the statements given above are correct?
III and IV only
Statement I is incorrect: the troposphere is thickest over the equator (about 18 km) because intense surface heating causes strong convection, and thinnest over the poles (about 8 km) — the opposite of what is stated. Statement II is incorrect: the ozone layer lies in the stratosphere, not the mesosphere. Statement III is correct: the ionosphere reflects radio waves back to the Earth, enabling long-distance radio communication. Statement IV is correct: the mesosphere is characterised by a fall in temperature with increasing altitude, making it the coldest layer of the atmosphere. Hence, only statements III and IV are correct.
Similar Questions
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- Nisarga, Gati, Nivar, Tauktae and Yaas are names of
Which one of the following can be said to be essentially related to ‘Polar Front Theory’?
Consider the following statements about Roaring Forties:
1) There are strong Westerly winds found in the oceans of the Southern Hemisphere.
2) The strong east to west air currents are caused by the combination of air being displaced from the equator towards the South Pole and the earth’s rotation and abundance of landmasses to serve as windbreaks.
Which of the statements given above is/are correct?
Consider the following characteristics of a tropical cyclone:
1. A warm sea temperature of > 26 0C
2. High relative humidity of atmosphere at a height of > 700 m
3. Atmospheric instability
The above mentioned characteristics are associated with which one of the following cycles of its development?
Rain shadow effect is associated with
Match List I with List II and select the correct answer using the code given below the Lists:
List I
(Cloud)
List II
(Characteristic)
A.
Cirrus
1.
Rain giving
B.
Stratus
2.
Feathery appearance
C.
Nimbus
3.
Vertically growing
D.
Cumulus
4.
Horizontally spreading
Which of the following statements concerning temperature is/are correct?
1) In winter season isotherms in Northern Hemisphere are more or less circular on continents
2) Isotherms are parallel to latitude in Southern Hemisphere in oceans
3) Minimum temperature during winter is recorded in North Canada
Select the correct answer using the code given below:Which of the following statements regarding tropical cyclones is/are correct?
1. These storms develop during the summer and autumn in every tropical ocean except the South Atlantic and eastern South Pacific Oceans.
2. Tropical cyclones that occur in the North Atlantic and eastern North Pacific Oceans are known as typhoons.
3. Tropical cyclones that occur in the Indian and South Pacific Oceans are called cyclones.
Select the answer using the code given below:
Which one of the following is the correct sequence of layers as we move from the Earth’s surface upwards?
Important Questions from Climatology
In which of the following atmospheric layers ozone gas is concentrated?
Ozone layer depletion is a major phenomenon in :
By which layer of the atmosphere the ultra-violet rays are absorbed ?
______ is the uppermost layer of the atmosphere.
Which of the following is correct about insolation?
I. It influences the distribution of temperature.
II. It increases from the equator towards the poles.
