Class 10 Biology Our Environment Introduction


Environment is the sum total of all plants, animals and microorganisms (biotic factors) with all non-living factors(abiotic components).

Fig. Our environment

Living beings always interact with each other as well as with the non-living things in the environment.

Environment consists of mixture of gases and particles, including nitrogen, carbon, oxygen, water.

Nitrogen, carbon, oxygen, water are changed from one form to another in separate biogeochemical cycles.

Biogeochemical cycle is the pathway by which a chemical substance moves through biotic and abiotic components of environment.

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