Geography
Answer
The atmosphere of the earth is composed of gases like nitrogen (78%), oxygen (21%), carbon dioxide, helium and argon (less than 1%). Atmosphere plays a major role in making earth a habitable planet as-
The atmosphere receives heat from the sun by solar radiation and loses heat by earth's radiation. In this way, a balance is maintained.
The earth's atmosphere is made up of life-supporting gases like nitrogen, oxygen and carbon dioxide.
Ozone present in the earth's atmosphere absorbs harmful ultraviolet rays of the sun.
The atmosphere also prevents loss of heat from the earth's surface and helps to keep earth warm.
Related Questions
Give a geographical reason for each of the following:
(i) The sunrise and sunset occur at different times at different places.
(ii) The earth is not a perfect sphere.
(iii) Venus is hotter than Mercury.Draw a well labelled diagram to show that the horizon of the earth is circular in shape.
Describe the role of water in making earth a habitable planet.
Describe the role of temperature in making earth a habitable planet.