Our Earth is a member of the solar system. Among all the members of the solar system, only Earth x has got suitable temperature, air and water required to sustain life. 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 and
4. Biosphere.
