Question

classify wind based on its spatial extent​

Answer 1

Answer:

i)Homosphere: This layer is extended up to a height of 80 km from

the earth’s surface. In this layer the chemical composition of all the gases is

same. About 99% mass of all the atmospheric elements is confined to this

layer.

ii)Heterosphere: The layer just above the homosphere is known as the

heterosphere. This layer of the atmosphere has created four layers by

nitrogen, helium and hydrogen with respect to their atomic weight. The air

density is too negligible in this layer of the atmosphere.

3. Write with diagram about the layers of the atmosphere based on the

variations in altitude and temperature and write the characteristics of each

layer in brief.

Answer: Based on the variations in altitude, the atmosphere can be divided

into the

following

layers:

i)Troposphere:

It is the lowest

layer of the

atmosphere. It

extends up to a

height of 12 km

from the

earth’s surface.

In this layer,

with the

increase in

altitude,

temperature

decreases.

Here, cloud formation, precipitation etc occurs.

ii)Stratosphere: This zone extends up to a height of 50 km from the

earth’s surface. The main characteristic of this zone is temperature increase

with the increase in height. Moreover, the thin layer of ozone gas which

absorbs the harmful ultraviolet rays of the sun is found in this layer.

iii)Mesosphere: This layer extends up to a height of 30 km from the

stratopause. The main characteristic of this layer is the decrease of air

temperature with the increase in altitude.

iv)Thermosphere: This layer extends up to a height of 400 km from

mesopause. This layer contains electrically charged ion particles. Hence, this

layer is also known as Ionosphere. The radio waves sent from the earth’s

surface are also reflected from this layer.

v)Exosphere: This is the topmost layer of the atmosphere which is

immediately above the thermosphere. This layer extends from a height of

400 km to 10000 km from the earth’s surface. Due to the dominance of only

hydrogen and helium gases, the air of this layer is very thin. The air

temperature at this level of atmosphere rises to about 55500C.

Explanation:

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