UPSSSC PET 2026 (25 Oct Shift 1)
Which atmospheric layer is characterized by a decrease in temperature with increasing altitude and contains the coldest temperatures in the Earth’s atmosphere ?
Answer (Detailed Solution Below)View answer ▾Hide ▴
Answer: Option D — Mesosphere
Detailed Solution
In the mesosphere (about 50–80 km) temperature falls with height to about −90 °C at the mesopause, the coldest part of the atmosphere. Temperature also falls in the troposphere, but not to such low values.
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Atmosphere, Weather & Climate — UPSSSC PET Preparation
This question tests your understanding of Atmosphere, Weather & Climate, a key topic in the UPSSSC PET General Knowledge section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.
This topic covers the composition and layers of the atmosphere, insolation and temperature, atmospheric pressure and the planetary winds, local winds, humidity, clouds and rainfall, cyclones and anticyclones, and the climatic regions of the world. Exam questions often test the layers of the atmosphere in order (troposphere, stratosphere, mesosphere, thermosphere and exosphere), the ozone layer in the stratosphere, and local winds such as the Loo (India), Chinook (North America) and Foehn (Alps). Learn the names given to tropical cyclones in different regions: hurricanes, typhoons and willy-willies. Practise the atmosphere, weather and climate questions below, written in the style of the general awareness sections of exams such as SSC, banking, railways, CUET GAT, MAH CET and CLAT. Each question comes with a detailed explanation that adds related facts, so every question helps you revise more than one point.