Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · Cambridge IELTS 19 · 2026-10-15

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 diagram illustrates the production of ethanol.

Overall, the circular process of producing biofuel consists of several stages, beginning with the cultivation of plants and tree and culminating in the production of Ethanol.

Initially, Plant and trees are cultivated by using energy, which is the combination of sunlight and carbon dioxide. Once plants and trees are mature, they are harvested mechanically by using tractor. Subsequently, these are then sent to pre-processing machine to produce cellulose. This cellulose is further processed in the laboratory for the production of sugars.

Next, the microbes are added in the sugars to eventually produce the biofuel called ethanol. Finally, the manufactured ethanol is used as a fuel for the purpose of operating different vehicles, namely cars, trucks and airplanes which then release carbon dioxide in the air. The carbon dioxide in the air is again combined with the sunlight for the growth of green spaces.

AI examiner evaluation

Task Achievement / Task Response: Band 7.0

The response gives a clear account of the main stages and identifies the process as circular, from plant growth through ethanol production to carbon dioxide returning to support further growth. It also accurately includes harvesting, pre-processing, cellulose, sugars, microbes and the three transport modes. This coverage and the overall summary make the account effective. Some details, however, are not fully faithful to the diagram: it says the cellulose is processed “in the laboratory,” whereas the visual shows a processing facility, and it suggests carbon dioxide combines with sunlight, rather than returning to the plants as part of the cycle. More precise reporting of these relationships, without adding unsupported specifics, would strengthen an otherwise well-focused description.

Coherence and Cohesion: Band 7.0

The response is organised in a clear sequence: an introduction and overview are followed by the early production stages and then the conversion, use and emissions stages. Sequencing expressions such as “Initially,” “Subsequently,” “Next” and “Finally” help the reader follow the process, and the final sentence links transport use back to the cycle. The progression is consistently logical. Some linking is slightly mechanical, particularly the repeated stage markers, and “Once plants and trees are mature” followed by “Subsequently, these are then sent” creates a somewhat cumbersome transition. More varied, precise links between stages and clearer reference to the materials being processed would make cohesion more flexible and polished.

Lexical Resource: Band 6.5

The vocabulary is adequate for describing a production process, with useful terms such as “cultivated,” “harvested,” “cellulose,” “microbes” and “culminating.” The writer also uses relevant process language, including “processed” and “production.” However, some choices are imprecise or awkward: “pre-processing machine” is not shown in the diagram, “in the laboratory” is an unsupported description, and “green spaces” is less accurate than referring to plants and trees. There are also collocation issues in phrases such as “added in the sugars” and “operating different vehicles.” Greater precision in naming stages and more natural combinations of words would improve flexibility and control.

Grammatical Range and Accuracy: Band 6.5

The response uses a mix of simple and complex structures, including the overview clause “beginning with … and culminating in …” and the time clause “Once plants and trees are mature.” Most sentences communicate the sequence clearly. Some grammatical errors remain, however: “plants and tree” has a number-agreement problem, “by using tractor” needs an article, and “the microbes are added in the sugars” uses an incorrect preposition within the construction. “Subsequently, these are then sent” also combines two sequencing signals unnecessarily. Review of articles, plural forms and prepositions, alongside more varied sentence patterns, would help make the grammar more consistently controlled.

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