Band 5.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 5.0 · Cambridge IELTS 19 · 2026-09-19
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 presented diagram demonstrates what way can be used to create biofuel which as known in combination as ethanol is generated.
The deep analysis of the presented diagram expresses that plants undergoes through several stages to induce ethanol.
To initiate with, power comes from outside in the form of sunlight and carbon dioxide to plants and trees. After that they are harvested by humans. Once they are harvested they goes through the process of pre-processing to cut them into pieces to obtain cellulose from them. After that process of producing ethanol begins and those pieces goes through several chemical processes.At the most least step sugars are gained through the processing and different bacterias forms such as microbes are added to them to obtain ethanol from it. During the whole process of making ethanol carbon dioxide is surrounded because it is very necessary for the production of ethanol. Now ethanol is ready for the usage of different transport. After doing all the steps ethanol making compnies sent ethanol to different petol pumps so they can provide ethanol to various vehicals.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 5.0 |
| Coherence and Cohesion | 5.0 |
| Lexical Resource | 5.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 5.0 |
Task Achievement / Task Response — Band 5.0
The student attempts to summarise the process of biofuel production as illustrated in the diagram. While the response identifies several key stages, such as the initial growth and harvesting of plants, pre-processing to obtain cellulose, processing into sugars, and the addition of microbes to create ethanol, the description contains inaccuracies and misses crucial cyclical elements. Specifically, the student states that 'carbon dioxide is surrounded because it is very necessary', which misinterprets the carbon-neutral cycle shown in the diagram where carbon dioxide is released by vehicles and absorbed by growing plants. Furthermore, the final stage introduces outside details not present in the visual, such as 'petol pumps' and 'vehicals'. The overview is weak and lacks a comprehensive summary of the entire cyclical process. Therefore, the response corresponds to Band 5.
Coherence and Cohesion — Band 5.0
The response has some organization with basic sequencing links such as 'To initiate with', 'After that', and 'Once they are harvested', but the overall progression lacks clarity and cohesion is frequently faulty or mechanical. The text is written as one large, dense paragraph instead of using appropriate paragraphing to separate distinct phases of the diagram. Referencing is sometimes unclear, particularly with pronouns like 'they' and 'them' used confusingly across sentences. Additionally, the misuse of cohesive devices and abrupt transitions between sentences make the flow disjointed, aligning the response with Band 5.
Lexical Resource — Band 5.0
The vocabulary used is basic and repetitive, with noticeable errors that occasionally cause difficulty for the reader. The student attempts some less common vocabulary items such as 'pre-processing', 'cellulose', and 'microbes', but struggles with word choice and collocation throughout. Examples of lexical errors include 'plants undergoes', 'most least step', 'bacterias forms', and spelling mistakes such as 'compnies', 'petol', and 'vehicals'. The lexical range is limited and minimally adequate for the task, which firmly places this response at Band 5.
Grammatical Range and Accuracy — Band 4.0
The student demonstrates a very limited range of grammatical structures, relying primarily on simple and attempted complex sentences that are frequently faulty. There are persistent grammatical errors throughout the text, including subject-verb agreement issues ('plants undergoes', 'pieces goes'), incorrect verb forms ('they goes', 'sugars are gained'), and awkward phrasing ('demonstrates what way can be used'). Punctuation is also weak, with missing commas after introductory phrases and spacing errors. These frequent errors cause difficulty for the reader and reflect the Band 4 descriptor.
See this exact question answered at other band scores — the same prompt compared across bands.
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