Question

Q.3 Explain the following cycles:

(i) Water cycle (ii) Carbon cycle (iii) Nitrogen cycle (iv) Oxygen cycle​

Answer 1

Explanation:

WATER CYCLE -----The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth.

CARBON CYCLE-----The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone.

NITROGEN CYCLE-----The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.

OXYGEN CYCLE -----The oxygen cycle is the cycle that helps move oxygen through the three main regions of the Earth, the Atmosphere, the Biosphere, and the Lithosphere. The Atmosphere is of course the region of gases that lies above the Earth's surface and it is one of the largest reservoirs of free oxygen on earth.

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Answer 2

1) water cycle is also known as the hydrological cycle which describes the continuous movement of water on above and below the surface of the earth

2)the carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere Hydrosphere pedosphere geosphere Hydrosphere and the atmosphere of the earth

3)the nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical form as it circulate among atmosphere and terrestrial

4)the oxygen cycle is the biogeochemical transition of oxygen atoms between different oxidation states in ion oxides and molecules through Redox reaction within and between the sphere of the planet Earth