Question

Which one of the following is the region of cold temperature?

• A. Mesosphere
• B. Thermosphere
• C. Ionosphere
• D. Exosphere

Answer 1

The correct option is A Mesosphere

A. Mesosphere is the layer just above the stratosphere and extends from 50-85 km. Temperature is about -90° C in this region.

B. Thermosphere is the layer above the mesosphere. Ultraviolet radiations can penetrate this layer and causes photodissociation of molecules. Temperature increases in this region.

C. Ionosphere is the region of upper atmosphere of Earth that extends from 60-1000 km. Ionization by solar radiation occurs in this region.

D. Exosphere is the outermost layer of Earth's which hardly contains air.

Hence,the region of cold temperature is Mesophere.

So, the correct answer is 'Mesophere'.