Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-11

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 6.0)

The picture illustrates the process how a biofuel named ethanol is formed.

Firstly, the energy is used for the growth of plants and trees which then harvested and then goies to pre-processing area. After that, cellulose goes for processing and sugers and microbes are added. Ethanol is formed.

Initially, the energy in the form of sunlight and carbon dioxide are used by the plants and trees for their growth. Then these plants and trees become harvested through heavy machines such as tractors. After harvesting, they tend to go for pre-processing sector. After pre-processing cellulose is formed. Then cellulose move towards the processing plant in which many sugars and microbes are added to cellulose for the production of ethanol. After the addition, ethanol is finally formed at this stage. Now ethanol is used in vehicles as fuel. Vehicles release carbon dioxide in the environment after burning of fuel which is then again used by the plants and trees for the same repeating process.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You cover the main stages from plant growth through processing to ethanol use, and you identify the important cyclical feature: carbon dioxide released by vehicles is taken up again by plants. This gives the reader a broadly accurate account of the diagram. However, some stages are less fully described or become unclear. For example, the response says “sugars and microbes are added to cellulose,” whereas the diagram shows sugars resulting from processing, followed by microbes being added before ethanol is produced. The overview is also implicit rather than clearly stated at the start. To strengthen the report, summarise the cycle and its key stages in a concise overview, then describe each stage in the correct order without adding unsupported details such as “many” sugars.

Coherence and Cohesion: Band 6.0

The response follows the process in a generally logical order, and sequencing expressions such as “Firstly,” “After that,” “Then,” and “Now” help the reader follow the cycle. The final sentence also links carbon dioxide back to plant growth, giving the account a sense of completion. However, the first paragraph repeats much of the second, and the report would be easier to follow if it had a clear overview followed by one organised description of the stages. Some links are mechanical, with “After” and “Then” used repeatedly, while “After the addition” does not clearly specify which addition is meant. Use paragraphing to separate the overview from the process details and vary linking through clear references to the stages.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “pre-processing,” “cellulose,” “processing,” and “carbon dioxide,” so the subject is generally clear. There are also useful attempts to describe the cycle, such as “used by the plants and trees for their growth.” However, several word choices and spelling errors reduce precision: “goies” and “sugers” are misspelled, “become harvested” is unnatural, and “pre-processing sector” is not an appropriate description of a process stage. “Heavy machines” is also less precise than naming the tractor shown. Aim for accurate spelling and natural collocations, and use the diagram’s labels consistently. More precise verbs for each transformation would make the account clearer and more fluent.

Grammatical Range and Accuracy: Band 5.5

You use both simple sentences and longer structures, including a relative clause in “Vehicles release carbon dioxide … which is then again used by the plants.” This shows some range, and the overall meaning remains understandable. However, some grammatical errors affect accuracy. In “plants and trees … are used,” the plural subject is paired with “energy,” so the verb should be singular; “which then harvested” also needs a passive verb form, such as “which are then harvested.” Later, “cellulose move” has a subject–verb agreement error, and “sugars and microbes are added to cellulose” does not clearly express the sequence. Check agreement, passive constructions, and clause links, while keeping some complex sentences to explain the stages and cycle.

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