Answer the following in one or two sentences:

Write a brief note on the various spheres of the Earth.

The planet Earth constitutes of many spheres. The spheres can be abiotic or biotic. The biotic spheres exist in earth is biosphere and abiotic spheres are lithosphere, atmosphere and hydrosphere.

The biosphere is the layer in which life exists. The human, plants and trees exist in the biosphere. Lithosphere, hydrosphere and atmosphere are the subsets of the biosphere.

The lithosphere is the solid outermost layer of the earth. It is the solid surface where we live, plant trees and constructs buildings.

Hydrosphere is the liquid part of the earth. It includes an ocean, sea, lake, etc. Life also exists in the hydrosphere such as fish and other water bodies.

The atmosphere is the layer in which the air is being available. Air is the most essential thing in life. The air that we breathe and carbon dioxide that plants consume are available in an atmospheric layer.