Band 5.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 5.0 · Cambridge IELTS 19 · 2026-09-01
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 5.0)
The diagram illustrate the Bio-fuel production in which whole process of ethanol production is described.
Overall, The process is initiated from the plants and trees where they start absorption energy from sunlight and produce carbon dioxide in the environment, after that harvesting process started in which trees crops harvest and send to the pre-processing procedure where they cut down into small pieces and turn into the form of Cellulose, After reforming into sugar cane form went back to the other processing process and resulted into Sugars where microbes added that is call "Ethanol". After that ethanol turn back into the Carbon Dioxide again same procedure follows.
In the Conclusion, In the graph Ethanol whole process describes and how Carbon Dioxide product though the vehicles and air-planes and these carbon dioxide absorb by the forest plants and those forest harvest by the manufacturing companies and produce ethanol in bulk quantities and useful for various industries like medical sectors, agriculture sectors etc.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 5.0 |
| Coherence and Cohesion | 5.5 |
| Lexical Resource | 5.0 |
| Grammatical Range and Accuracy | 5.0 |
| Overall | 5.0 |
Task Achievement / Task Response — Band 5.0
The response attempts to describe the biofuel production process, but it fails to accurately reflect the information provided in the diagram. The description of the process is confusing and contains factual inaccuracies, such as claiming that plants 'produce carbon dioxide' as a primary step or that microbes are 'called Ethanol'. The summary lacks a clear overview of the cyclical nature of the process. While the main features are mentioned, the lack of precision and the inclusion of irrelevant information (e.g., mentioning medical and agricultural sectors which are not in the diagram) prevent a higher score. The response is more of a narrative than a technical summary.
Coherence and Cohesion — Band 5.5
The essay is organised into three paragraphs, which is appropriate for a report. However, the logical progression of ideas is weak. The use of cohesive devices is often mechanical or misused, such as 'After that ethanol turn back into the Carbon Dioxide again same procedure follows.' The referencing is sometimes unclear, making it difficult for the reader to follow the sequence of the production cycle. While there is an attempt to use transition words, the overall flow is disjointed, and the connection between the stages of the diagram is not clearly articulated.
Lexical Resource — Band 5.0
The vocabulary is limited and often inaccurate. There is a reliance on basic terms, and the student struggles to use technical terminology correctly, such as referring to the addition of microbes as 'that is call Ethanol'. There are also issues with word forms and collocations, such as 'absorption energy' instead of 'absorbing energy' and 'resulted into' instead of 'resulted in'. The range of vocabulary is insufficient to describe a technical process with precision, leading to some confusion for the reader regarding the actual steps of the biofuel production.
Grammatical Range and Accuracy — Band 5.0
The response contains frequent grammatical errors that occasionally impede clarity. There are issues with subject-verb agreement ('The diagram illustrate', 'process is initiated... where they start'), tense consistency, and sentence structure. Many sentences are run-on or lack proper punctuation, such as the second paragraph which is a single, long, and confusing sentence. While some simple structures are used correctly, the attempt at more complex sentences often results in errors. The control of basic grammar is inconsistent, which significantly impacts the overall quality of the writing.
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.