Question

Tell Realms of the earth

Answer 1

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 realm of the earth and it supports life.One of the reasons for supporting life is that the earth has plenty of water on its surface. The first life on the earth is originated in water.The outer solid layer of the earth is called crust or lithosphere. The word lithosphere comes from a Greek word Lithos which means rock. So, the crust or lithosphere is made up of rocks.About one-third of the earth’s surface is occupied by land and the rest is covered with waterVast land masses rising above the sea level are called continents.There are seven continents in the world. They are Asia, Europe, Africa, North America, South America, Australia andAntarctica.The continents are separated from one another by huge bodies of water called oceans.The level of the oceans is all the same and this level of water is called the sea level.About 250 million years ago, all the continents were joined to form one huge landmass called Pangea.


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Answer 2

The four realms of earth are : lithosphere, hydrosphere, biosphere and atmosphere .
Lithosphere : the outer most solid layer of the earth that is composed of rocks and soil is known as lithosphere.