Natural Resources ( Part – 5 )

Biogeochemical Cycle

A constant interaction between biotic and abiotic components of the biosphere makes it dynamic , these components transfer heat and energy to different components.

The water Cycle

We know that the water evaporates from the water bodies and condence this water and leads to rain . We also know that the water from sea and oceans also evaporates but these water bodies does not became dry . We know that the water of ocean and sea water evaporates and condence and leads to rain . This rain falls on the land some amount of this water seeps by soil and remaining water flow back to the water bodies . The process of evaporating water from water bodies and goes back to the water bodies , this complete process is known as the water cycle . The water seeps by the soil finds its way though its surface springs , known as underground water . This underground water is used by us for many process by tube wells and ponds . This water is used for irrigation , life process and full filling the need of water ( For drinking , Cooking ) . When the water flows on the rocks , or the land , then many nutrients and minerals are dissolved in the water and goes to the sea and rives by the flow of water this leads to marine organisms .

The Nitrogen Cycle

Science ncert solutions

We know that makes a 78 % of our atmosphere and nitrogen is also a part of many molecules essential for our life proteins , some vitamins , DNA and RNA . Nitrogen is also a main part of alkaloids and urea too. Nitrogen is main part for all life cycle and life is so simple if we use nitrogen present in our atmosphere . Some nitrogen fixing bacteria converts these hidden nitrogen into nitrites and these bacteria are present freely in atmosphere . These nitrogen fixing bacteria present in the roots of the plants . Due to the lighting , the high pressure and temperature creates the nitrogen into nitrogen oxide.

These nitrogen oxide dissolved in water to give nitric and nitrous acids and falls on the land along with rain and these are utilized by various life forms .

Plants take these nitrates and nitrites and convert them into amino acid . This amino acid is used to make proteins . Some other complex compounds are made by nitrogen . These nitrogen and complex compound are taken by the animals . When the plants or animals die some other type of bacteria convertes back these nitrogens into nitrides and nitrites . A other type of bacteria converts the nitrides and nitrites into nitrogen elements . This whole process is known as nitrogen cycle in which nitrogen passes from its elemental form in the atmosphere into simple in the soil and water . Which get converts in various nitrogen molecules in life cycles and converts back into the elementary nitrogen .

Milan Tomic

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