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NATURAL RESOURCE - Coggle Diagram
NATURAL RESOURCE
Biogeochemical Cycles
Oxygen Cycle 
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Carbon Cycle
Carbon is incorporated into life forms by the process of photosynthesis and returns to the atmosphere through respiration , decomposition , combustion , etc .
Nitrogen Cycle
Nitrogen an important nutrient for all life forms is circulated through the living and non-living components of the biosphere through various processes like nitrogen fixation, ammonification, nitrification and dentrification.
Water Cycle
Water is constantly exchanged between the air, land , sea and between living organisms and their environments by global and biological water cycle .
Soil
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Composition of Soil
Soil is a mixture of rock particles , decayed organisms called humus , living organisms , minerals , air and water .
Soil Pollution
The addition of harmful substances which affects the fertility of the soil and kills the diversity of organisms living in it is called soil pollution .
CAUSES
Modern farming practices involve the use of large amounts of fertilizers and pesticides. Use of these substances over long periods of time can destroy the soil structure by killing the soil micro-organisms that recycle nutrients in the soil. It also kills the Earthworms which are instrumental in making the rich humus. Fertile soil can quickly be turned barren if sustainable practices are not followed.
Soil Erosion
The carrying away of soil from one place to the other by flowing water and wind is called destruction .
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Air
Air Pollution
The presence of harmful substances in the air leads to pollution of the air. It can severely affect the health of living organisms and the quality of the environment.
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Water
Necessity of Water
The presence of water in a region decides the biodiversity of that area to a great extent .The cellular processes take place in the water-like-medium.A major constituent of blood is water which allows it to carry substances throughout the body.Water helps in regulating the body temperature in animals and human beings.It prevents the tissues, organs and cells from drying out by keeping them moist.
Water Pollution
Water pollution occurs when harmful substances such as chemicals and waste materials like garbage are present in water that affect its quality and the presence of life in it.
EFFECTS
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Water pollution can lead to a decrease in the amount of Oxygen and nutrients in the water which affects the aquatic life.
Addition of unwanted substances such as fertilizers pesticides and industrial wastes can make it poisonous and extremely harmful for consumption.
Water pollution can cause changes in the temperature of water. An increase in temperature is not suitable for all the aquatic animals especially their eggs.
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Ozone Layer
In the stratosphere, a molecule containing three atoms of oxygen is found with chemical formula of O3 and this is called ozone.
FUNCTION
The ozone layer shields the entire Earth from much of the harmful ultraviolet radiations that comes from the Sun.
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CAUSES
The release of CFCs ,Chlorofluorocarbons
Global Warming
Greenhouse gases such as carbon dioxide, methane, nitrogen oxide and Chlorofluorocarbons present in atmosphere prevent the escape of heat falling on Earth’s surface rather than absorbing it. This keeps the Earth warm and the phenomenon is known greenhouse effect.
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