Question

1.Write the composition of the atmosphere.
2. Describe the features of the atmosphere.
3. Write the characteristics of the thermosphere. ​

Answer 1

Answer:

1.Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere.

2.It protects us from the harmful radiations of the Earth. Earth's atmosphere is about 300 miles thick. The gases like Nitrogen, Oxygen, Argon, Carbon dioxide, Neon, Helium etc, contribute to the Earth's atmosphere. It is divided into 5 layers- exosphere, thermosphere,mesosphere, stratosphere and troposphere.

3.Characteristics of Thermosphere

It is located above the mesosphere and is the fourth layer of the earth. Its temperature changes with solar activity. In its interior sublayer i.e. ionosphere the radio waves are reflected. The boundary between the thermosphere and the exosphere is called Thermopause.