Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · 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 6.5)

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

Overall, the process is cyclic and consists of several distinctive 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 in the environment to continue the process.

Vegetation grows using light energy from the sun and carbon dioxide and is proceeded to be 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, creates ethanol.

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

AI examiner evaluation

Task Achievement / Task Response — Band 6.5

The response successfully identifies the main features of the ethanol production process. You have clearly outlined the stages from vegetation growth to the final application in transportation. The overview is effective in capturing the cyclic nature of the process. To reach a higher band, ensure that you explicitly mention all key stages shown in the diagram, such as the specific role of 'fermentation' or 'distillation' if they were present, or ensure the transition between the laboratory phase and the final fuel product is described with more technical precision. The summary is accurate and covers the requirements well.

Coherence and Cohesion — Band 7.0

The essay is logically organized, with a clear introduction, body paragraphs, and a concluding summary. The progression of ideas follows the chronological order of the process, which makes the text easy to follow. You have used cohesive devices such as 'After that', 'This manufactured biofuel', and 'which, in turn' to link sentences and ideas effectively. Paragraphing is used appropriately to separate the different stages of the cycle. The flow is smooth, and the relationship between the stages is clearly established throughout the response.

Lexical Resource — Band 6.0

You have used a sufficient range of vocabulary to describe the process, including terms like 'manufacturing process', 'recirculates', 'cellulose', and 'microbes'. There is an attempt to use less common vocabulary, which is appropriate for this task. However, there is a minor spelling error ('dixoide' instead of 'dioxide'). Despite this, the vocabulary is precise enough to convey the technical nature of the diagram without difficulty. The range is adequate for the task and demonstrates a good level of control over the subject matter.

Grammatical Range and Accuracy — Band 6.5

The response displays a good mix of simple and complex sentence structures. Most sentences are error-free, and the grammar is generally accurate. For example, the use of relative clauses ('which recirculates...') and passive voice ('is proceeded to be harvested') is handled well. There are very few grammatical slips, and the punctuation is generally correct. The control over complex structures is sufficient to support clear communication throughout the report. The occasional minor error does not impede the reader's understanding of the process.

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

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.