Question

the four realms of the earth explain them

Answer 1

the four realms of earth are 1. Lithosphere:-  The word Litho came from a Greek word which means stone.it is the outermost layer on the earth. it occupies about 29% of the total surface of the earth.it contains all  second order landforms. 2. Hydrosphere:- the word Hydro came from a Greek word which means water. it covers about 71% of the earths surface. hydrosphere contains all the first order landforms.3. Atmosphere:- it is about 700kmts thick and contains all gases in it. it saves all living organisms from UV rays of sun. it also reduces the temperature of the earth.4.Biosphere:- The word Bio came from a Greek word which means life. it is the part where the living organisms live. it is the combination of all the realms in which life exists.

Answer 2

The realm of land is called lithosphere, the realm of water is called hydrosphere and the realm of air is called atmosphere. The narrow zone where land, water and air meet is called biosphere. It is the fourth realmof the earth and it supports life. ... There are seven continents in the world.