Wednesday, 1 August 2018

ClASS 7:-OUR ENVIRONEMENT BY NCERT

The nature, place, people, things, etc. that surrounding the living organisms make the environment. It has three components: Natural, human and human-made. It is a combination of both natural as well as man-made phenomena.


Natural Environment:i) Lang, water, air, plants and animals comprises the natural environment.ii) Lithosphere, atmosphere, hydrosphere and biosphere are the four domains of the natural environment.iii) Lithosphere is the solid crust or the hard top layer of the earth. It contains landforms like mountains, plateaus, plains and valleys.
iv) Hydrosphere is the domain of water. It comprises water bodies like rivers, lakes, seas, oceans, etc.v) The atmosphere is the thin layer of earth that surrounds the earth. It protects us from the harmful rays and scorching heat of the sun.vi)Biosphere is a narrow zone of the earth where land, water and air interact with each other to support life.

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