What are the Three Main Reservoirs of Oxygen in Nature
The Three Steps of the Oxygen Cycle
Importance of the Oxygen Cycle in Nature
How Do Humans Affect the Oxygen Cycle
Photolysis – Ultraviolet radiation of the sun breaks down atmospheric water and nitrous oxidePhotosynthesis – Plants make food and release oxygen as a byproduct Weathering – Oxygen-containing minerals in rocks gradually breaks down
2) Utilizing the Free Oxygen
Involves the following processes:
Respiration – Animals take in oxygen from the atmosphere and use it to break down carbohydrates Decomposition – Invertebrates, including fungi, bacteria, and some insects decay the dead organic matter of plants and animals remains Combustion – Organic materials, including fossil fuels, plastics, and wood, are burned in the presence of oxygenCorrosion – Metals like iron or alloy rust when they are exposed to moisture and oxygen for an extended period, new compounds of oxides are formed by the combination of oxygen with the metal
3) Utilizing Carbon Dioxide and Releasing Oxygen Back
Carbon dioxide present in the atmosphere is again utilized by green plants with the help of:
Photosynthesis – Plants utilize the carbon dioxide present in the atmosphere for preparing food, thus completing the cycle
Indiscriminate cutting of trees or deforestation Much higher human birth rate compared to death rateEffluents from vehicles, industries, and burning of fossil fuels
