1. Atmosphere- The Atmosphere is theProtective blanket of gases surrounding the earth. It sustains life on the earth and saves it from the hostile environment of outer space.

2. Hydrosphere- The Hydrosphere comprises all types of water resources oceans, seas, lakes, rivers, streams, reservoir, polar icecaps, glaciers, and ground water

3. Lithosphere- Lithosphere is the outer mantle of the solid earth. It Contains various types of soils and rocks on the earth.

4. Biosphere- Biosphere composed of all living organisms and their interactions with the environment