Atmosphere of Earth
That the atmosphere of the earth is divided in to four categories, which are 1.Troposhere, 2.startosphere, 3.Mesosphere, 4.Thermosphere /Ionosphere, which are respectively described in brief as under:-
1.Troposphere.
this atmospheric sphere starts from the surface of the earth to an altitude of 40,000ft, all the clouds and wind storms happens to be in this sphere.
2.Startosphere.
That this sphere starts after an altitude of 20 kilometers up to 30 kms, the ozone layer which protects the earth from ultraviolet radiation of the sun is present in this sphere, and from the environmental point of view there is little bid movements
3.Mesosphere.
That this sphere is present after the territory of stratosphere in the altitude and is below the ionosphere.
4. Thermo sphere/Ionosphere.
That the thermo sphere starts from an altitude of 50 km upto 250km, and due to presence of ions in this sphere is also called ionosphere.