Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-11-04

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 diagram illustrates the process of biofuel production called ethanol.

Overall, biofuel production of ethanol has steps before it becomes a raw material for transportation.There are several process that help the ethanol to be produced.First is growing of plants and trees with the help of sunlight and carbon dioxide,then harvesting,pre-processing,processing and the end product then how it is used.

Looking at the diagram,the energy from the sunlight is the source of nutrients that help plants and trees grow.Then it is harvested and was collected for pre processing,the cellulose from the byproduct of the harvested plants, is processed into sugar forms and was added by microbes.

Moreover the processed product becomes the ethanol,which helps the engines of different trasport services to move.Thus, these vehicles produce carbon dioxide and it flows back into the air and help with the process of growth on plants and trees with combination of sunlight which serves as the primary nutrients.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You cover the main stages from plant growth through harvesting, processing and ethanol production, and you also describe the return of carbon dioxide to support further plant growth. This gives the response a relevant overview of the cycle. However, some details are incomplete or imprecise: the diagram shows cellulose being converted into sugars, then microbes being added, but the description compresses these steps into “processed into sugar forms and was added by microbes.” It also shows ethanol being used by cars, trucks and aeroplanes, whereas “different transport services” is less specific. The role of sunlight and carbon dioxide is broadly recognised, though calling them “nutrients” is not accurate. More precise reporting of these stages would strengthen the account.

Coherence and Cohesion: Band 6.5

The response has a recognisable overall progression: an introduction and overview are followed by the production stages and then the fuel’s use and carbon cycle. Sequencing words such as “Overall,” “Looking at the diagram,” and “Moreover” help signal movement between points. At times, however, the links are mechanical or unclear. The overview’s “First is growing … then harvesting, pre-processing, processing” does not clearly distinguish the intermediate cellulose, sugars and microbes stages. The sentence beginning “Then it is harvested” also leaves the reference of “it” uncertain. Paragraphing is limited, and several ideas are crowded into long sentences. Grouping the stages into plant growth/preparation, conversion to ethanol, and transport/carbon return would make the progression clearer and more controlled.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “harvesting,” “pre-processing,” “cellulose,” “microbes” and “carbon dioxide,” which helps communicate the subject. There is also some attempt to vary wording through phrases such as “end product” and “processed product.” However, several choices are imprecise or unnatural for this diagram: “source of nutrients” mislabels sunlight and carbon dioxide, “sugar forms” is awkward, and “transport services” does not naturally describe the vehicles shown. Spelling errors such as “trasport” and inconsistent forms such as “pre processing” also reduce accuracy. Aim for precise process terms and natural collocations, for example “converted into sugars” and “used as fuel by vehicles.”

Grammatical Range and Accuracy: Band 5.5

You attempt both simple and more extended sentence forms, and the main sequence is generally understandable. Some grammatical errors remain, particularly in verb forms, agreement and sentence boundaries. For example, “Then it is harvested and was collected” shifts tense within a coordinated structure; “There are several process” has a plural-agreement error; and “the cellulose … is processed … and was added” does not maintain a consistent subject and verb pattern. The opening overview also runs several clauses together, while missing spaces after full stops and commas make boundaries harder to follow. Use consistent present simple for a process description, check singular and plural agreement, and divide long sentences where the subject changes.

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