Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · Cambridge IELTS 19 · 2026-10-09

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 6.5)

The diagrammatic representation illustrates the process for producing biofuel called ethanol.

Considering it from an overall perspective, it can be apparently observed that this process commences with harvesting mature plants and ends with releasing carbon dioxide into atmosphere that helps plants to grow and the cycles continued again.

To begin with, after absorbing sunlight and carbon dioxide from the atmosphere for some period the plants and trees become mature. And than it is harvested using machineries. In the further step, the harvested crops are send for pre-processing which converts them into cellulose. After that, the cellulose are sends to factories for processing which coverts them into sugars.

In the next step, microbes are added into sugars to became ethanol and finally the ethanol is ready for use. Furthermore, the ethanol is used by cars, trucks and planes which further release carbon dioxide into atmosphere which helps plants and trees to grow and the cycle continues.

AI examiner evaluation

Task Achievement / Task Response: Band 7.0

You cover the main stages and give a clear overview of the cycle, noting that plants absorb sunlight and carbon dioxide and that emissions from transport return to support plant growth. The sequence from harvesting through pre-processing, cellulose, processing, sugars and microbes to ethanol is also accurately represented. This gives the reader a sound account of the process. To make the description more fully developed, include the diagram’s three transport modes as the uses of ethanol and clarify that carbon dioxide is released when they use it. The overview says the process “commences with harvesting,” although the diagram begins with plant growth using sunlight and carbon dioxide; adjusting this would make the cycle’s starting point more precise.

Coherence and Cohesion: Band 6.5

The response is arranged in a sensible sequence: an introduction and overview are followed by the production stages and then the fuel’s use and return to the cycle. Phrases such as “To begin with,” “In the further step,” and “In the next step” help signal progression, and the final sentence links transport emissions back to plant growth. However, several transitions are repetitive or awkward, and the overview’s claim that the process starts with harvesting conflicts with the later explanation of plant growth. The sentence beginning “Furthermore” also repeats information already introduced. More precise sequencing language and clearer links between stages would make the progression smoother and less mechanical.

Lexical Resource: Band 6.0

You use an adequate range of process vocabulary, including “pre-processing,” “cellulose,” “processing,” “sugars,” and “microbes,” which allows you to describe the diagram’s key stages. There are also useful attempts at formal phrasing, such as “overall perspective” and “diagrammatic representation.” Some choices are inaccurate or unnatural, however: “the cycles continued again” is not idiomatic, “using machineries” is an unsuitable plural form, and “become mature” is less precise than describing plants as growing. “Coverts” also appears to be a spelling error for “converts.” Aim for natural collocations and precise process verbs while retaining the relevant technical terms.

Grammatical Range and Accuracy: Band 5.5

You attempt both simple and complex sentences, including a time clause in “after absorbing sunlight and carbon dioxide” and a relative clause in “which further release carbon dioxide.” The overall meaning remains understandable, but errors in verb forms and agreement recur. For example, “it is harvested” does not agree with the plural “plants and trees,” while “the harvested crops are send” and “the cellulose are sends” have incorrect passive forms and agreement. “To became ethanol” also uses the wrong verb form. Some sentence boundaries are awkward, particularly the fragment-like “And than it is harvested…” after a full stop. Practise accurate passive constructions and check subject–verb agreement; these are the main limits on control.

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