Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · Cambridge IELTS 19 · 2026-09-27

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 diagram illustrates how a biofuel called ethanol is made.

Overall, it is evident that the production involves a multi-satge cyclical stages, begining with plants absorbing sunlight and carbon dioxide to grow and culminating in the release with the release of carbon dioxide by into the atmosphere by vehicles.

To begin with, energy from sunlight along with atmosphere carbon dioxide enables plants and trees to grow. Once mature, these plants are harvested asing machinery. The harvested using plant matter then undergoes a pre- processing stage, where it is broken down into cellulose.

Following ore-processing, the cellulose is processed in specialized facilities to release sugars. Microbes are then added to ferment these sugar into biofuel (ethanol). This produced ethanol is then supplied to fuel stations and used to power vehicles such as cars, trucks, and buses. Finally, as these vehicles run on the biofuel, they emit carbon dioxide back into the atmosphere, which is then absorbed by new plants, restarting the entire cycle.

AI examiner evaluation

Task Achievement / Task Response: Band 7.0

The student successfully covers all the key stages of the process diagram, from the initial growth of plants using sunlight and carbon dioxide to the final combustion and release of carbon dioxide into the atmosphere. The overview is clearly stated in the second sentence, capturing the cyclical nature of the process. All stages—including harvesting, pre-processing into cellulose, processing into sugars, adding microbes for fermentation into ethanol, and vehicle emissions—are reported accurately in a logical order without omitting critical steps. The information is fully grounded in the provided visual data, meeting all requirements for a Band 7.0 in Task Achievement.

Coherence and Cohesion: Band 7.0

The response features clear logical organisation and progression throughout. The cycle is introduced well with an overall statement, and the progression follows the sequence of the diagram seamlessly. Cohesive devices such as 'To begin with', 'Once mature', 'Following ore-processing', and 'Finally' are used effectively to guide the reader through the steps of the process. Paragraphing is handled properly, separating the introduction/overview from the main body steps, though the body is written as a single paragraph. Referencing is generally clear, contributing to a coherent flow.

Lexical Resource: Band 6.5

The student demonstrates a sufficient range of vocabulary appropriate for a process diagram, using less common items such as 'cyclical', 'culminating', 'specialized facilities', and 'ferment'. However, there are a few noticeable spelling and typographical errors, such as 'multi-satge', 'begining', 'asing', and 'ore-processing' (instead of pre-processing). Despite these mechanical issues, the vocabulary is precise enough to communicate the scientific and industrial steps clearly, fitting the Band 6.5 descriptor well.

Grammatical Range and Accuracy: Band 7.0

The writer uses a good mix of simple and complex sentence forms, incorporating participial phrases ('absorbing sunlight', 'culminating in') and subordinate clauses effectively. There are some minor grammatical slips and typos, such as 'release with the release of', 'carbon dioxide by into the atmosphere by', and 'ferment this sugar' (instead of these sugars), but these do not impede communication. The majority of complex sentences are well-constructed, demonstrating good overall grammatical control deserving of a Band 7.0.

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