The four spheres of Earth are:
1. Atmosphere
2. Lithosphere
3. Hydrosphere
4. Biosphere
1. Atmosphere
Atmosphere is the thick, gaseous cover of air surrounding the planet Earth. It protects and sustains life on the planet by absorbing harmful cosmic and ultraviolet solar radiations, maintaining heat balance and providing oxygen and carbon dioxide gases which are essential for respiration and photosynthesis respectively.
2. Lithosphere
Lithosphere is the hard and rigid outer part of the Earth consisting of the crust and uppermost mantle. The topmost part of the solid earth, consisting of weathered rocks, minerals and organic matter, is known as soil.
3. Hydrosphere
Hydrosphere is the collective mass of water found both on the surface and beneath the surface of Earth. It includes water in all forms including oceans, rivers, lakes, pond, stream, glaciers, polar ice caps and groundwater.
4. Biosphere
Biosphere is the part of Earth where living organisms exist and interact with each other as well as with non living things. Biosphere consists of plants, animals and microorganisms. It penetrates into all the other spheres of Earth namely atmosphere, lithosphere and hydrosphere.
1. Atmosphere
2. Lithosphere
3. Hydrosphere
4. Biosphere
1. Atmosphere
Atmosphere is the thick, gaseous cover of air surrounding the planet Earth. It protects and sustains life on the planet by absorbing harmful cosmic and ultraviolet solar radiations, maintaining heat balance and providing oxygen and carbon dioxide gases which are essential for respiration and photosynthesis respectively.
2. Lithosphere
Lithosphere is the hard and rigid outer part of the Earth consisting of the crust and uppermost mantle. The topmost part of the solid earth, consisting of weathered rocks, minerals and organic matter, is known as soil.
3. Hydrosphere
Hydrosphere is the collective mass of water found both on the surface and beneath the surface of Earth. It includes water in all forms including oceans, rivers, lakes, pond, stream, glaciers, polar ice caps and groundwater.
4. Biosphere
Biosphere is the part of Earth where living organisms exist and interact with each other as well as with non living things. Biosphere consists of plants, animals and microorganisms. It penetrates into all the other spheres of Earth namely atmosphere, lithosphere and hydrosphere.
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