Layers of the Atmosphere — UPSC Prelims PYQ 1998

The correct sequence of different layers of the atmosphere from the surface of the Earth upwards is

1. Troposphere, Stratosphere, Ionosphere, Mesosphere
2. Stratosphere, Troposphere, Ionosphere, Mesosphere
3. Troposphere, Stratosphere, Mesosphere, Ionosphere
4. Stratosphere, Troposphere, Mesosphere, Ionosphere

Explanation

Option (c) is correct

• The lowest layer is the troposphere, where weather phenomena occur, followed by the stratosphere containing the ozone layer. Above it lies the mesosphere, and then the ionosphere, which contains ionised particles important for radio communication. Hence, the correct upward sequence is Troposphere → Stratosphere → Mesosphere → Ionosphere.

Answer: (c) Troposphere, Stratosphere, Mesosphere, Ionosphere