Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · Cambridge IELTS 19 · 2026-08-20

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 7.0)

The illustration depicts the manufacturing process of a biofuel, namely ethanol.

Overall, the process is cyclic and consists of a range of several distinct phases. Solar energy and carbon dioxide gas serve as the raw materials which commence the cycle. The fuel is used in transportation which recirculates the carbon dioxide gas back into the environment to continue the process.

Vegetation grows using light energy from the sun and carbon dioxide and is then harvested by tractors. After that, the grown crops go through pre-processing machines which extract cellulose from the crops. Laboratories transform this cellulose into sugars, and through the addition of microbes, create ethanol.

This manufactured biofuel has many applications in the transportation industry, starting from cars and lorries plying on the road to jet planes flying in the sky. All these transport modes emit carbon dioxide gas back into the atmosphere, which, in turn, keeps the manufacturing process going.

AI examiner evaluation

Task Achievement / Task Response — Band 6.5

You have successfully identified the main features of the ethanol production process. The overview clearly captures the cyclic nature of the diagram, and the subsequent paragraphs follow the stages logically from raw materials to final application. You have included all key stages, such as harvesting, cellulose extraction, and the chemical transformation into ethanol. To reach a higher band, ensure you explicitly mention the specific inputs and outputs at each stage, such as the role of 'pre-processing' and the specific conversion of cellulose to sugars. Overall, the response is accurate and covers the requirements of the task well.

Coherence and Cohesion — Band 7.0

The response is logically organized, with a clear progression from the introduction to the final stage of the cycle. Paragraphing is used effectively to separate the different phases of the process. You use cohesive devices such as 'After that', 'This manufactured biofuel', and 'which, in turn' to link ideas smoothly. The flow of information is easy to follow, and the relationship between the different stages is clearly established. The structure is coherent, and the use of referencing is generally accurate, contributing to a well-structured and easy-to-read summary.

Lexical Resource — Band 6.5

You demonstrate a good range of vocabulary appropriate for a process description, such as 'manufacturing process', 'recirculates', 'cellulose', and 'microbes'. The word choice is generally precise and fits the context of the diagram well. There are no significant spelling errors, and the vocabulary used is sufficient to convey the technical nature of the process clearly. To improve further, you could incorporate more sophisticated collocations or academic synonyms to enhance the precision of your descriptions, though your current range is already quite effective for this task.

Grammatical Range and Accuracy — Band 7.0

The writing displays a good variety of sentence structures, including complex sentences that effectively combine information. Grammar is generally accurate, and punctuation is handled well. There are no major errors that impede communication. You have used a mix of simple and complex forms, such as 'Vegetation grows using light energy... and is then harvested by tractors', which shows good control. The majority of your sentences are error-free, and the overall grammatical control is strong, meeting the criteria for a high band score.

See this exact question answered at other band scores — the same prompt compared across bands.

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