Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · Cambridge IELTS 19 · 2026-07-29

IELTS Writing Task 1 question

 

The diagram below shows how a biofuel called ethanol is produced.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 7.0)

The process chart illustrates the process of making a biofuel known as ethanol.

Overall, there are multiple steps including agricultural, mechanical, chemical and microbial processing of the sugarcane plants.

To commence with, plants use solar energy and carbon dioxide to grow and mature. After that, these mature plants are harvested mechanically and manually by the farmers. In the next stage, the harvested crop is pre- processed in a machine to create cellulose. The cellulose is went through a chemical processing which makes a polymer chain of sugar.

Moving to the next stage, the sugar polymer is etched with some different types of microbes to break the sugar particles and generate the ethanol. The ethanol is used as a biofuel in the various modes of transport. The final step depicts that this biofuel releases carbon dioxide as a by-product which eventually reused by the plants to grow and makes a full cycle of generating Ethanol biofuel.

AI examiner evaluation

Task Achievement / Task Response — Band 7.0

The response successfully identifies the main features of the ethanol production process. You have provided a clear overview and followed the sequence of steps from cultivation to the final use of biofuel. However, the description of the process could be more precise. For instance, the transition from 'cellulose' to 'sugar polymer' and the use of 'etched' to describe the microbial process are slightly inaccurate or vague in a technical context. To reach a higher band, ensure that the terminology used accurately reflects the stages shown in the diagram, and try to highlight the cyclical nature of the process more explicitly in the body paragraphs rather than just the conclusion.

Coherence and Cohesion — Band 7.5

The response is logically organized, with a clear introduction, body, and conclusion. You have used transition signals such as 'To commence with', 'After that', 'In the next stage', and 'Moving to the next stage' to guide the reader through the process. The paragraphing is appropriate for a short report. While the flow is generally smooth, some of the cohesive devices feel slightly mechanical. To improve, try to vary the sentence structure and use more sophisticated linking phrases to connect the stages, rather than relying solely on time-based transitions.

Lexical Resource — Band 6.5

You have used a sufficient range of vocabulary to describe the process, including terms like 'agricultural', 'mechanical', 'microbial', and 'by-product'. However, there are some inaccuracies in word choice, such as 'etched' (which is not the correct term for microbial action) and 'pre-processed' (which is slightly redundant). Additionally, 'is went through' is a grammatical error that affects the lexical presentation. To improve, focus on using more precise technical verbs and ensuring that collocations are natural. Expanding your vocabulary to include more varied verbs for process description would also be beneficial.

Grammatical Range and Accuracy — Band 6.5

The response contains a mix of simple and complex sentence structures. While the meaning is generally clear, there are several grammatical errors that detract from the quality. For example, 'the cellulose is went through' should be 'the cellulose goes through' or 'is processed'. The phrase 'etched with some different types of microbes' is awkward, and 'eventually reused by the plants' is missing a subject or auxiliary verb (e.g., 'is eventually reused'). To improve, focus on subject-verb agreement and the correct use of passive voice, which is essential for describing processes.

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