Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-29

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 demonstrates the nine-step process of how biofuel which normally known as ethanol is made.

Overall, the biofuel production is a cyclic and natural process. It starts from energy exist in a form of sunlight and carbon dioxide (CO2) and ends with production of ethanol. Plants and trees grow by utilizing energy from the surrounding and get harvested, after pre-processing it, cellulose obtained as a result and by further processing on it, sugars structure are found in which microbes added, which finally gives us ethanol.

The process starts with energy present in environment such as sunlight and carbon dioxide. Energy consumed by the plants and trees on the earth to grow which will be cultivated after fully grown. Then, come preprocessing stages which get input as plants and output as a complex structure known as cellulose.

Moreover, in laboratories, these cellulose get examined and yield as sugars structure after preprocessing. After obtaining sugars from cellulose, further microbes will add into it and their combination finally gives us ethanol. However, biofuel further utilized in different transports such as cars, trucks and airplanes as a fuel and these mobiles emit carbon dioxide in the air and this CO2 will become a part of an environment as a form of energy.

AI examiner evaluation

Task Achievement / Task Response: Band 7.0

You cover the main stages and give a clear overview of the cycle, including plant growth, harvesting, conversion to cellulose and sugars, the addition of microbes, and ethanol use in transport. The account of carbon dioxide returning to the plants also captures the diagram’s key cyclical feature. This is a well-focused response, although a few details are over-generalised or not fully accurate: the diagram shows carbon dioxide and sunlight as inputs for plant growth, rather than energy simply being “consumed,” and it does not identify the processing facility as a laboratory. The overview also says the process ends with ethanol, while the diagram continues through transport and carbon dioxide returning to the plants. Covering that final loop more precisely would strengthen the report further.

Coherence and Cohesion: Band 6.5

The response is arranged in a sensible sequence, with an overview followed by descriptions of the production stages and then the fuel’s use and carbon cycle. Linking expressions such as “Overall,” “Then,” “Moreover,” and “However” help signal progression, and the reader can follow the process. This meets the lower-band expectation of a coherent overall arrangement and shows some flexibility in linking ideas. However, the overview repeats much of the stage-by-stage account, and “Moreover” does not clearly mark a contrast or addition in the way it is used. Some references, such as “it” in “after pre-processing it,” are not immediately clear. Reduce repetition and use more precise links between stages to make cohesion smoother.

Lexical Resource: Band 6.0

You use a relevant range of process vocabulary, including “harvested,” “pre-processing,” “cellulose,” “microbes,” and “emit carbon dioxide.” These terms allow you to describe the diagram’s main stages, and the meaning is generally understandable. There are, however, some inaccurate or unnatural choices and collocations, such as “sugars structure,” “examined,” “combination,” and “mobiles.” “Biofuel which normally known as ethanol” is also an awkward way to introduce the product. Aim for more precise process language and natural collocations, for example, saying that cellulose is processed into sugars and that microbes are added to the sugars. This would improve accuracy and flexibility without requiring more complicated vocabulary.

Grammatical Range and Accuracy: Band 5.0

You attempt both simple and longer sentences, including clauses that explain sequence and cause, such as “after obtaining sugars from cellulose, further microbes will add into it.” However, control is inconsistent, and errors in sentence structure, verb forms, agreement, and articles occur often enough to make some sentences difficult to read. Examples include “biofuel which normally known,” “Energy consumed by the plants,” “these cellulose get examined,” and “microbes will add into it.” Several sentences also lack a clear main clause or use awkward clause connections. Practise building accurate subject–verb sentences first, then add subordinate clauses. For instance: “Plants use sunlight and carbon dioxide to grow. After harvesting, they are pre-processed to produce cellulose.”

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