Process Diagram

Band 7+: The diagrams below show the amount of energy lost in 100 units when it is generated from black coal and when it is generated from brown coal. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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Image for topic: The diagrams below show the amount of energy lost in 100 units when it is generated from black coal and when it is generated from brown coal. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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The image illustrates the loss in the generation of electricity from brown coal and black coal: for brown coal, fuel energy input is 100 units, with a power station loss of 70 units, delivering 30 units to transportation and distribution that incur a 3-unit loss, resulting in a consumer receiving 27 units; for black coal, fuel energy input is 100 units, with a power station loss of 68 units, delivering 32 units to transportation and distribution that incur a 3-unit loss, resulting in a consumer receiving 29 units.

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

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Note: Both the topic and the answer were created by one of our users.

The two diagrams illustrate the ways of fuel energy generated from brown and black coal and the amount of its loss during the stages when it finnally reaches consumers.

Overall, according to the diagrams, generation of electricity from black coal is more efficient than from brown coal. During both stages of generation of electricity: power station and transportation & distribution, there are losses in the amounts of both types of coal.

Looking more closely at the diagrams, it is noticeable that at the power station the decline in the number of brown coal units is larger than loss of black coal, with 70 units and 68 units respectively. In contrast, the stage of transportation & distribution generates the same amount of loss – 3 units of black and brown coal.

Additionally, it is worth to mention that generation of electricity from black coal is more profitable because at the end of the production there are 29 units of it, while only 27 units of electricity reaches consumers when it is made of brown coal.

Word Count: 174

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Overall Band Score

(+/- 0.5)

Vocabulary Complexity:
C1 - Intricate
Strive to incorporate even richer and more precise language.

Grammar Mistakes: N/A

Vocabulary Repetition:

units: 6

brown: 5

black: 5

diagrams: 3

generation: 3

electricity: 3

Try using synonyms for the above words

Task Response

The report effectively addresses the task by presenting the main features of the energy loss for both coal types and making relevant comparisons. The overall trend is clearly identified, and the key data points (power station losses, distribution losses, and final consumer units) are accurately reported. Minor omissions, such as not explicitly stating the input of 100 units for each coal type, are acceptable. The structure is logical, with an introduction, overview, and detailed paragraphs. To improve, ensure all data points are explicitly mentioned and consider using more varied vocabulary to describe the process.

Coherence & Cohesion

The report is generally well-organized with a clear overall structure: an introduction, an overview, and a detailed comparison. The use of cohesive devices such as 'Overall', 'Looking more closely', and 'In contrast' helps the reader follow the progression of ideas. However, there are minor lapses in cohesion, such as the phrase 'the decline in the number of brown coal units is larger than loss of black coal' which could be more clearly linked to the preceding sentence. Additionally, the final paragraph could be more smoothly integrated with the rest of the report. Overall, the message is easy to follow, but there is room for improvement in the flow between some sentences.

Lexical Resource

The report demonstrates a good range of vocabulary appropriate for the task, including terms like 'generation of electricity', 'power station', 'transportation and distribution', and 'efficient'. There is some effective use of comparative language, such as 'more efficient' and 'more profitable'. However, there are a few instances of less precise or slightly awkward phrasing, such as 'the decline in the number of brown coal units' and 'it is worth to mention'. The vocabulary is generally accurate and appropriate, but a wider range of synonyms and more sophisticated expressions could enhance the report.

Grammatical Range & Accuracy

The report uses a variety of sentence structures, including complex sentences and comparative forms, which demonstrates good grammatical control. There are, however, a few grammatical errors and awkward phrasings that slightly affect clarity, such as 'when it finnally reaches consumers' (spelling error), 'the decline in the number of brown coal units is larger than loss of black coal' (missing article), and 'it is worth to mention' (should be 'worth mentioning'). These issues are minor and do not significantly impede understanding, but they do prevent the report from achieving a higher band score. With more careful proofreading and attention to grammatical accuracy, the report could be improved.

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