Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-22

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 process diagram illustrates the complete procedure by which biofuel is produced, It is also known as ethanol.

Overall, Biofuel production is carried out by multiple processes that is started from sunlight and carbon dioxide and followed by multiple processes and the end product is ethanol with the emmission of carbon dioxide.

Firstly, the plants and trees are grown, after some time they are harvested and followed by the next process that is Pre-processing of plants after that the cellulose is removed by that method then it is further processed in the laboratory which is shown in the picture.

Furthermore, after the laboratory processing the sugars are extracted from the cellulose, In the final stage the microbed are added with sugars and form the final product called Ethanol. Ethanol is used by different types of transport including cars, trucks and airoplanes, At the end the carbon dioxide is exausted by tranportation into the open air.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You cover the main stages from plant growth through processing to ethanol use, and you correctly identify the return of carbon dioxide as part of the cycle. The overview also captures the broad start and end points. This is a solid account of the process, but some details are incomplete or unclear: the diagram shows sunlight and carbon dioxide supporting plant growth, cellulose being produced after pre-processing, and microbes being added before ethanol forms. Your description of sugars being “extracted from the cellulose” is not explicit in the diagram, and the final carbon dioxide is described as going into the open air rather than returning to the plants. To strengthen the response further, report these relationships precisely and make the cyclical feature clearer in the overview.

Coherence and Cohesion: Band 6.0

The response has a recognisable structure: an introduction, an overview, and two paragraphs describing the stages in sequence. Sequencing expressions such as “Firstly,” “Furthermore,” and “In the final stage” help the reader follow the process. However, some links are mechanical or unclear, particularly the repeated “after” and “followed by” constructions in the third paragraph. The overview’s sentence also combines several ideas without clear boundaries, while capitalisation after commas makes the progression less polished. Use shorter, clearly connected sentences and refer back to stages explicitly—for example, distinguish pre-processing, cellulose production, and subsequent processing—so that cohesion supports rather than obscures the sequence.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “harvested,” “cellulose,” “sugars,” and “final product,” and the reader can generally understand the stages. There is some range in your wording, but several choices are imprecise or incorrectly formed, which limits clarity: “microbed” should be “microbes,” “emmission” should be “emission,” and “exausted” is not the appropriate verb for carbon dioxide being released. “Laboratory” is also an unsupported description of the processing facility, which the diagram depicts as a factory or refinery. Aim for accurate process collocations and check spelling carefully; precise terms such as “is converted into” and “is released” would make the account more natural and exact.

Grammatical Range and Accuracy: Band 5.0

You attempt both simple and complex sentences, including time and sequence clauses such as “after some time they are harvested” and “after the laboratory processing the sugars are extracted.” However, control is uneven, and several sentence structures are faulty or difficult to follow. For example, “Overall, Biofuel production is carried out by multiple processes that is started…” has an agreement error and an awkward relative clause; “the cellulose is removed by that method then it is further processed” also joins clauses without clear punctuation. Capital letters after commas and inconsistent sentence boundaries add further errors. Practise forming accurate passive sentences for process descriptions, and separate stages into complete sentences with consistent tense and punctuation.

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