How did the four spheres come into existence on Earth?

1.	How did the four spheres come into existence on Earth?
Answer» Earth was a huge ball of fire which cooled down with time. Various elements on Earth were transformed into solids, liquids, gases or life forms in the process. They formed the four major spheres on Earth, which are : (1) Lithosphere (2) Hydrosphere (3) Atmosphere (4) Biosphere. The elements on the surface of the Earth that got transformed into solid (land) make up the ‘Lithosphere’. Elements that got transformed into liquid form the ‘Hydrosphere’; those which transformed into gases are called the ‘Atmosphere’ and the living world which developed is known as the ‘Biosphere’.

Answer»

Earth was a huge ball of fire which cooled down with time. Various elements on Earth were transformed into solids, liquids, gases or life forms in the process.

They formed the four major spheres on Earth, which are :

(1) Lithosphere

(2) Hydrosphere

(3) Atmosphere

(4) Biosphere.

The elements on the surface of the Earth that got transformed into solid (land) make up the ‘Lithosphere’. Elements that got transformed into liquid form the ‘Hydrosphere’; those which transformed into gases are called the ‘Atmosphere’ and the living world which developed is known as the ‘Biosphere’.

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