sources of atmospheric oxygen

A thick gaseous envelope surrounding the earth is called atmosphere. The density of air in the atmosphere varies with altitude. It filters sunlight reaching the earth, affects climate and serves as a reservoir of elements essential for life (eg. oxygen, nitrogen, CO ..

Oxygen is the most abundant of all elements in the crust of the earth. It is present in sand and rocks in the form of silicon dioxide, and in most of the common compounds like oxides, carbonates, nitrates, etc. It is also present in air, water and land as organic compounds like carbohydra..

Rich sources of liver, kidney, milk, eggs, fish, pork and chicken. Vitamin B 1 2 is synthesized in micro-organisms and hence B 1 2 is found only in animal foods and absent in plant foo..

Main source of oxygen are the plants which evolve oxygen as a by-product of photosynthesis. It is used chiefly by most of the living organisms in their aerobic respiration except certain anaerobics. Oxygen acts as a limiting factor in the distribution of ani..

Oxygen - Oxygen is very essential for the existence of human life on Earth. It is the most abundant element on the surface of the Earth. In a free state, it is present in the Earth's atmosphere to an extent of about 21% by volume, (23.15% by mass) In the combined form,..

Oxygen Cycle - Oxygen is another essential element for living organisms. It is present in large quantities (20.95% v/v) in the atmosphere and is also seen in bound state in water and as oxides and carbonates in rocks. Dissolved oxygen in water is the sou..

Atmospheric Resources - The atmosphere around earth is a blessing of nature on earth to have permitted the existence of life on it. Earth is endowed with an excellent resource of atmosphere - both to shield it from sun's harsh rays and other ill effects of celestial bo..

Atmospheric Pollutants - Many of the air pollutants are naturally present in the atmosphere in low concentration. They become pollutants when their concentration is relatively high. For example, SO 2 is considered as pollutant when its concentration in the atmosph..

Many of the air pollutants are naturally present in the atmosphere in low concentration. They become pollutants when their concentration is relatively high. For example, SO 2 is considered as pollutant when its concentration in the atmosphere exceeds the normal ..