Carbon Cycle

The Carbon Cycle

The Carbon Cycle is a complex series of processes through which all of the carbon in existence rotates. Carbon is an essential element which is used in life process like photosynthesises which occurs in daytime in the presence of sunlight and carbon in the gaseous form of carbon dioxide.

All green plants are known as producers because they can produce their own food via the process of photosynthesis. The green plant is always the start of any food chain and is consumed by the primary consumer. Photosynthesis occurs in the green part of a plant, usually the leaf as chlorophyll is present here, were the carbon dioxide is absorbed from the atmosphere through the stomata which are pores caused by guard cell and is stored in the spongy mesophyll layer of the plant were it used alongside light and the green pigment chlorophyll which produces glucose, water and oxygen as the products of the process. The glucose is used by the plant as a food source and the water is mainly lost via transpiration to the atmosphere and oxygen is secreted by the processes of simple diffusion. Plants are autotrophic as they produce their own food. As explained above carbon dioxide is absorbed from the atmosphere into the plant for photosynthesis.

 

Another life process which occurs in animals all the time but in plants only in night time in the absence of sun light is Respiration. There are two forms of respiration, either aerobic respiration were there is adequate supply of oxygen or anaerobic respiration were there is a lack of oxygen and it produces lactic acid which is the cause of pain and fatigue in animals like humans. The process of respiration is a life process and involves the use of oxygen and glucose to produce the waste products of carbon dioxide and water. The carbon dioxide is secreted from the person via diffusion out of the animals respiratory system into the atmosphere were there is a increase in carbon concentration, but this carbon dioxide can be used by a green plant for photosynthesis.

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However, as deforestation is taking place on a mass scale in less economically developed countries in order to provide enough land to grow crops to feed a ever growing population and for industry to build factories this is preventing carbon dioxide from being absorbed from the atmosphere into plants which is causing carbon dioxide in the atmosphere to accumulate, this leads to further problems like global warming. Global warming is were the carbon dioxide is acting as a green house gas, this process causes the earths surface to heat up considerably and also results in unpredictable weather patterns which ...

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The main points are hidden in the essay, but the delivery was very poor - the wordings (e.g. ‘certain process like industry) needs improving, I think the author have rushed in writing this and have not gone back to review it again.

This article contains a lot of facts, which are all relevant to the question. What the author failed to do is to explain why those facts relate to the question. For example, he/she jumped from greenhouse gases to acid rain. If you are to do that, at least have a heading of ‘Factors concerning levels of atmospheric CO2’ or simple write in a short paragraph what you are going to discuss. There are some inaccuracies in the essay, for example, not all carbon in existence follow the carbon cycle (rotate is the wrong word to use), think about carbon in outer space. Also, not all food chains start with green plants, there are other ways for organisms to obtain energy, for example using energy from heat vents deep under the sea. Just some wordings should be clarified, which if the author read through the essay once, would probably have spotted. For example, the word cause is not used appropriately here ‘the stomata which are pores caused by guard cell’ The guard cells forms the pore, but it didn’t cause it. There are no details or formulas as to how the carbon is fixed. No detailed mechanism is required for this level, but still a simple A+B=>C+D would be better. The author should give clear and specific examples, rather than generalizing them all. E.g. “Studies from well recognised scientist bodies”. It can improve on this by adding additional information about effects on other parts of the atmosphere.