Process Diagram

Band 8+: The diagram below shows how ethanol fuel is produced from corn

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Image for topic: The diagram below shows how ethanol fuel is produced from corn

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The image illustrates the ethanol fuel production process from corn, starting with storing corn (2), followed by milling (3) and cooking with water for 4 hours (4), then fermenting for 48 hours (5), separating liquid and solid by-product (6), purifying ethanol for 5 hours (7), storing (8) and finally distributing to gas stations (9).

Given the complexity of the image, the above description may not be entirely accurate.

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The diagram illustrates the various stages in the production of ethanol from corn.Overall, there are nine main stages in the process of making ethanol, from the storage of corn to the transportation of ethanol fuel to gas stations.

At the first stage in the corn ethanol making process, corn is harvested and then put in a suitable place to ensure safe storage. Then corn is ready for milling into powder by a milling machine. Next, water is added to this powder and this material is cooked for 4 hours.

In the following stage in the process, the cooked mixture is fermented, which lasts 48 hours before this mixture is separated into liquid and a solid by- product. After that, the liquid is purified for a period of 5 hours to produce ethanol fuel. Finally, this fuel continues to be stored then transported to gas stations.

Word Count: 145

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Overall Band Score

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Vocabulary Complexity:
B2 - Upper Intermediate
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Grammar Mistakes: N/A

Vocabulary Repetition:

ethanol: 5

process: 3

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Task Response

The report fully satisfies the requirements of the task. It provides a clear overview of the process and accurately describes each stage in a logical sequence. The use of cohesive devices and appropriate transitional phrases ensures a smooth flow of information. The response is well-structured and covers all key details provided in the visual description. The report falls short of the required 150 words.

Coherence & Cohesion

The report is exceptionally well-organized. The progression of information follows a logical sequence that mirrors the process described in the diagram. The use of cohesive devices such as 'At the first stage', 'Then', 'Next', 'In the following stage', and 'Finally' allows the reader to follow the steps effortlessly. Paragraphing is used effectively to separate the introduction/overview from the detailed body paragraphs.

Lexical Resource

The vocabulary used is appropriate, accurate, and sufficient to describe the process clearly. Terms like 'milling into powder', 'fermented', and 'purified' are used correctly in context. To reach a band 9, you could incorporate even more sophisticated synonyms or varied phrasing to describe the transitions between stages (e.g., instead of 'this mixture is separated', using 'the resulting mixture undergoes separation').

Grammatical Range & Accuracy

The report demonstrates a high level of grammatical control. There is a good use of the passive voice ('is harvested', 'is added', 'is fermented'), which is the standard and most appropriate academic style for describing a manufacturing process. Sentence structures are varied, combining simple and complex forms effectively without errors.

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