Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · 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 6.0)

The diagram illustrates the process of how bio fuel is produced.

Overall, it is clear that the process has several steps, beginning with harvesting of plants and trees and culminating in releasing of carbon dioxide by automobiles like cars, trucks and aeroplanes.

Initially, the trees and plants absorb sunlight and carbon dioxide to perform photosynthesis, later they are harvested by tractors. Susequently, the harvested product will be pre-processed by machinary and then cellulose is formed as a result after pre-processing. Next it is sent to labs and kept in burette, and further undergoes processing to form sugars.

Following this, microbes are added to the sugars to form ehtanol. Thereafter, automobiles like cars, trucks and aeroplanes use ethanol for their movement. In the next stage, carbon dioxide is released by those automobiles. Finally, carbon dioxide is released into air. Again it is absorbed by the plants for photosynthesis, and the cycle repeats.

AI examiner evaluation

Task Achievement / Task Response — Band 6.5

The student successfully addresses all parts of the task by summarizing the main stages of the ethanol production cycle shown in the diagram. The response starts with the absorption of sunlight and carbon dioxide by plants and trees, continues through harvesting, pre-processing, cellulose formation, processing into sugars, adding microbes, producing ethanol, and finally releasing carbon dioxide through transportation back into the environment. An overview is provided in the second paragraph, highlighting the cyclical nature of the process. While minor details like 'burette' are an interpretation not explicitly shown in the raw visual text, the overall selection and reporting of main features are accurate and clearly presented, satisfying the requirements for a Band 7.0.

Coherence and Cohesion — Band 6.5

The response is logically organized with a clear progression from the beginning of the cycle to the end. Paragraphing is used effectively to separate the introduction, overview, and sequential steps of the process. Cohesive devices such as 'Initially', 'Susequently', 'Next', 'Following this', and 'Finally' are employed to guide the reader through the stages of the diagram, although some transitions feel slightly mechanical. Referencing is generally clear, ensuring the cycle's flow is easy to follow. These qualities align well with the Band 7.0 descriptors for logical organization and cohesion.

Lexical Resource — Band 5.5

The vocabulary used is adequate for the task, with domain-specific terms such as 'photosynthesis', 'cellulose', 'microbes', and 'ethanol' successfully integrated. However, there are some spelling errors, notably 'bio fuel' (written as two words in the introduction), 'Susequently', 'machinary', and 'ehtanol'. Furthermore, the inclusion of specific laboratory apparatus like 'burette' is slightly imprecise given the diagrammatic context. While less common lexical items are attempted, these inaccuracies in spelling and word choice place the lexical resource firmly at a Band 6.0.

Grammatical Range and Accuracy — Band 5.5

The student demonstrates a mix of simple and complex sentence forms, utilizing passive structures appropriately in phrases like 'the harvested product will be pre-processed' and 'microbes are added'. There are several grammatical and mechanical errors, such as missing articles ('releasing of carbon dioxide', 'into air') and punctuation issues in complex clauses. However, these errors do not impede communication, and the meaning remains clear throughout the response. This performance is consistent with the Band 6.0 descriptor for grammatical range and accuracy.

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