Band 6.0 IELTS Writing Task 1 Model Answer

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

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 below explain the process of production of biofuel called ethanol.

Overall, the procedure starts from the plants harvesting which is conerted into sugar and finally into ethanol. It is then used for varoius useful purposes and release carbon dioxide in the atmosphere.

The journey starts from the plants and they receive energy; sunlight and carbon dioxide from the air for their growth. These plants were harvested by the farmers, and after pre-processing converted into cellulose, which is then further processed in labortaries by the scientists and the sugar is formed. Microbes are mixed with sugar to make biofuel known as ethanol. It is then used for several purposes for the welfare the society, mankind and to make people life easy. It is used in engines of cars, trucks, and airplane so people can travel easily from one place to another, and in return carbon dioxide is added to the environment which is again moved back toward plants.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You identify the main stages and give an overview of the process, including plant growth, conversion through cellulose and sugar, ethanol use, and the return of carbon dioxide to plants. This captures the diagram’s central circular feature. The sequence is mostly accurate, but some details are less fully reported: for example, the diagram shows sunlight and carbon dioxide supporting plant growth, and ethanol being used by three transport types, which you do mention. However, the explanation that processing occurs “in laboratories by the scientists” and the claims about social welfare and making life easier are not shown in the diagram. Keep the account focused on observable stages and avoid adding unsupported context. A more precise overview of the cycle and its key transformations would strengthen the response.

Coherence and Cohesion: Band 6.5

The response has a clear overall arrangement: an introduction, an overview, and a chronological account of the stages. Sequencing phrases such as “Overall,” “The journey starts,” and “in return” help the reader follow the process, and the final reference to carbon dioxide returning to plants links back to the beginning. However, the body is largely one long paragraph, and several ideas are joined into extended sentences, making the progression less easy to scan. The discussion of the benefits to society also interrupts the process description. Use separate paragraphs for the overview and stage-by-stage account, and connect each stage with concise, accurate transitions. Referencing could also be clearer when moving from plants to the materials produced from them.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “pre-processing,” “cellulose,” “microbes,” and “carbon dioxide,” which allows the main stages to be understood. There is also some variety in expressions such as “converted into” and “used for several purposes.” However, spelling errors are noticeable, including “conerted,” “varoius,” and “labortaries,” and some phrases are imprecise or unnatural, such as “the welfare the society” and “make people life easy.” “Sugar” should also be expressed as “sugars” to match the diagram. These choices limit precision and fluency. Aim for accurate spelling and concise process language, rather than broad claims about social benefits that are not relevant to the visual.

Grammatical Range and Accuracy: Band 5.5

You attempt a mixture of simple and complex sentences, including a passive construction in “These plants were harvested” and a relative clause in “which is then further processed.” The stages remain understandable, but some grammatical errors recur. For example, “The picture below explain” has subject–verb disagreement, while “the procedure starts from the plants harvesting” uses an awkward grammatical construction. In “after pre-processing converted into cellulose,” the clause needs a clear subject and verb, and “to make people life easy” has an incorrect possessive form. Tense and agreement are also inconsistent in places, as in “plants … receive” followed by “were harvested.” Use a consistent present tense for a process diagram and check that each clause has a complete, correctly formed structure.

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