Band 8.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 8.0 · Cambridge IELTS 19 · 2026-09-09

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 8.0)

The provided diagram illustrates the cyclical process by which a renewable biofuel known as ethanol is manufactured and consumed.

Overall, the production of ethanol is a continuous loop that combines biological growth, industrial processing, and fuel consumption. The entire procedure can be divided into three main stages: the cultivation and harvesting of raw materials, the chemical transformation into ethanol, and its utilization as a transportation fuel which naturally replenishes the carbon cycle.

The cycle commences when plants and trees grow by utilizing solar energy and absorbing carbon dioxide from the atmosphere. Once mature, these plants are harvested using mechanical equipment such as tractors. The gathered biomass then undergoes a pre-processing stage to extract cellulose.

In the subsequent industrial phase, the extracted cellulose is sent to a processing facility where it is broken down and chemically converted into sugars. Following this, specific microbes are introduced to ferment the sugars, ultimately yielding ethanol.

In the final stage, the finished biofuel is distributed to power various modes of transportation, including cars, trucks, and airplanes. The combustion of ethanol in these vehicles releases carbon dioxide back into the atmosphere. This emission completes the closed-loop cycle, as the carbon dioxide is once again absorbed by growing plants and trees through photosynthesis.

✓

AI examiner evaluation

Task Achievement / Task Response — Band 8.0

The response is excellent. You have successfully identified and reported the main features of the ethanol production cycle. The overview clearly captures the cyclical nature of the process, and the body paragraphs logically detail the three distinct stages: cultivation, industrial processing, and consumption. You have effectively integrated the information from the diagram, making relevant comparisons and connections between the stages, such as linking the combustion of fuel back to the absorption of carbon dioxide by plants. The response is well-developed and fully addresses all parts of the prompt.

Coherence and Cohesion — Band 8.0

The response is logically organized with a clear progression from the start of the cycle to its conclusion. Paragraphing is used effectively to separate the different stages of the process. You have employed a variety of cohesive devices, such as 'In the subsequent industrial phase', 'Following this', and 'In the final stage', which guide the reader smoothly through the text. The referencing is precise, and the flow of information is natural and unobtrusive, meeting the criteria for a high band score.

Lexical Resource — Band 8.0

You demonstrate a wide and sophisticated range of vocabulary that is highly appropriate for a process description. Terms such as 'cyclical process', 'biomass', 'cellulose', 'fermentation', and 'combustion' are used accurately and in the correct context. The language is precise and shows a high level of control, allowing for a fluent and professional tone throughout the report. There are no noticeable errors in word choice or collocation.

Grammatical Range and Accuracy — Band 8.0

The writing exhibits a wide range of complex grammatical structures, including passive voice constructions ('is manufactured', 'is sent', 'are introduced') and complex sentence patterns that are handled with high accuracy. The majority of your sentences are error-free, and the punctuation is used correctly to support the clarity of your ideas. The control over tense and aspect is consistent, reflecting the nature of a continuous, ongoing process.

See this exact question answered at other band scores — the same prompt compared across bands.

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