Geography question from JKAS Prelims, 2021 by JKPSC
Find out the correct order of sequence of vertical structure of the atmosphere from lower to higher altitudes
Last updated Jun 24, 2026
Correct Answer:
Option A —
Troposphere, Stratosphere, Mesosphere and Thermosphere
The atmosphere is divided into layers based primarily on temperature gradients as you move away from the Earth's surface.
Vertical Structure (From Bottom to Top):
Troposphere (0–12 km): The lowest layer where we live. It contains roughly 80% of the atmosphere's mass and almost all its water vapor. Temperature decreases with altitude here.
Stratosphere (12–50 km): This layer contains the Ozone Layer, which absorbs UV radiation. Because of this absorption, temperature increases with altitude. Commercial jet aircraft often fly in the lower stratosphere to avoid weather turbulence.
Mesosphere (50–80 km): The coldest layer of the atmosphere. Temperatures decrease again, reaching as low as -90°C. This is the layer where most meteors burn up upon entry.
Thermosphere (80–700 km): In this layer, temperature increases significantly with height due to the absorption of high-energy X-rays and UV radiation from the sun. It includes the Ionosphere, which is critical for radio communication.
Exosphere: The outermost fringe of the atmosphere that gradually fades into outer space.
Quick Tip for Remembering:
You can use the mnemonic: "Trust Smart Men The Emost" (Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere).
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
