Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-20

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 6.0)

The diagram illustrates the production of ethanol through microvial processing at industrial level.

Overall, the entire process based on sustainability in which involves various steps, starting from harvesting of sugarcane to the extraction of the biofuel( ethanol ).

The process begins with, the harvesting of produce ( sugarcane) and transportation of the harvest to the industry where first mechanical pre-processing happens, that extracts cellulose from the sugarcane. Extarctes cellulose undergoes chemical treatment, where sugars were seperated out of it. Furthermore the sugars undergoes microbial digestion where the microbes ferment the sugar and produces ethanol as a by-product. Moving further the biologically treated ethanol then used to fill in various vehicles like, areoplanes, trucks, cars, etc. The bruning of fuel by these vehicals releases carbon dioxide which then utilized by plants in the nature nad produces energy using sunlight and carbon dioxide. In a nutshell, the carbon dioxide get recycled again and the process continues.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You identify the process as ethanol production and give a relevant overview of its circular, sustainable nature, including the return of carbon dioxide to plants. The main stages are also covered: harvesting, pre-processing, cellulose, sugar production, microbial action and fuel use. This provides a sound account of the diagram. However, some details are inaccurate or insufficiently grounded: the diagram does not identify sugarcane, and it does not show transportation of the harvest to industry or explicitly describe chemical treatment and fermentation. The opening also omits the initial growth of plants using sunlight and carbon dioxide. To strengthen the response, report only what is shown and describe the stages in the diagram’s order, including plant growth at the start and the three transport modes at the end.

Coherence and Cohesion: Band 6.5

The response has a clear overall shape: an introduction and overview are followed by a chronological account, and the final sentence returns to the cycle. Connectors such as “Furthermore” and “Moving further” help signal progression, while the sequence from cellulose to sugars and ethanol is generally easy to follow. However, the opening sequence is not fully aligned with the diagram, since the account begins with harvesting rather than plant growth. Some linking is mechanical, and the long final process description packs several stages and the carbon cycle into one paragraph, making relationships less clear. Use separate, purposeful stages in the description and precise links such as “After this” or “Finally”; ensure each reference, especially “it,” clearly identifies the material being discussed.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “pre-processing,” “cellulose,” “microbial digestion,” “ethanol,” and “carbon dioxide,” which allows the reader to understand the general subject. There are also attempts at more specific description, such as “by-product” and “recycled.” However, several word choices or forms are inaccurate or awkward, including “microvial processing,” “extraction of the biofuel,” and “biologically treated ethanol.” Spelling errors such as “Extarctes,” “seperated,” “bruning,” and “vehicals” are noticeable and reduce precision. Aim for standard process terms and natural collocations, for example, “ethanol production,” “cellulose is converted into sugars,” and “the fuel is used by vehicles.” Proofreading spelling would make the vocabulary more reliable.

Grammatical Range and Accuracy: Band 5.0

You attempt a mixture of simple and complex sentences, including a relative clause in “where the microbes ferment the sugar” and a longer sequence describing the carbon cycle. However, grammatical control is uneven, and errors occur in several sentence patterns. For example, “Overall, the entire process based on sustainability in which involves” lacks a complete, correctly linked clause; “the sugars undergoes” has subject–verb disagreement; and “the biologically treated ethanol then used” is missing a verb. Articles and sentence boundaries also need attention, as in “the harvesting of produce” and the comma after “begins with.” Use complete clauses with consistent tense, check singular and plural agreement, and divide long sentences so that each stage is expressed clearly.

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