Question

The part of the atmosphere beyond 90 km from the earth is called :

• A. heterosphere
• B. homosphere
• C. Photosphere
• D. Precipitation

Answer 1

Answer:

A. heterosphere

Atmosphere

• The composition of the atmosphere is somewhat uniform up to about 90 Kilometers from the surface of the earth

• This part of the atmosphere is called homosphere.

• Beyond this there is no uniformity in the gaseous composition. So the part of the atmosphere beyond 90 km from the earth is called as heterosphere.

The atmosphere can be divided into four layers or zones on the basis of its altitude and thermal condition. Temperature variation are experienced as its altitude increases from the earth. Atmospheric layers:

• Troposphere

• Mesosphere

• Stratosphere

• Thermosphere