Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-09-23

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 stages of a cycle involved in the production of a biofuel named ethanol.

Overall,the cycle begins with energy consumption for the growth of plant, followed by harvesting , then two step processing for the extraction of sugars, where finally production of ethanol after microbes addition. Eventually allocating to automobiles, releasing exhaust gaes which are taken by plants and completing the cycle.

At the first stage, plants harness energy from the environement for the growth of plants and trees in the form of sunlight and cardon dioxide. Following this plants are harvested and delived to next destination, where they go through pre treatment to extract cellulose from the plants.

Therafter, actual processing begins in the laboratory with chemicals and other instruments, resulting in the isolation of sugars needed for the the biofuel synthesis. The process ends when specific microbes are combined with these isolated sugars which results in the biofuel generation. At the end, biosynthesized ethanol is used by vehicle as a fuel.

The cycle completes when the relased CO2 is released and taken by plants for growing.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

The student successfully addresses all parts of the task by outlining the circular process of ethanol production and its carbon cycle. An overview is provided in the second paragraph, capturing the main stages from plant growth to fuel use and carbon dioxide absorption. Key features, such as harvesting, pre-processing, sugar extraction, and the addition of microbes, are accurately reported and sequenced in line with the diagram. The relationship between biofuel combustion in vehicles and carbon dioxide reabsorption by plants is also clearly noted. While the phrasing is occasionally slightly awkward, all major steps of the visual data are covered accurately without major omissions or extraneous information, fitting the Band 7 descriptor well.

Coherence and Cohesion: Band 6.0

The response is logically organised and presents a clear progression from the start of the process to its completion. Paragraphing is used appropriately to separate the introduction, the overview, the middle stages, and the conclusion. Cohesive devices such as 'At the first stage', 'Following this', 'Therafter', and 'At the end' help guide the reader through the sequence of events. However, there are some minor mechanical errors in cohesion and referencing, such as the missing article in 'for the growth of plant' and awkward transitional punctuation ('Overall,the cycle'). Despite these minor flaws, the overall arrangement is coherent and easy to follow, corresponding to a solid Band 6.5 or 7.

Lexical Resource: Band 6.0

The student demonstrates an adequate range of vocabulary suitable for describing a technical process, using terms such as 'biofuel', 'harvesting', 'pre-processing', 'cellulose', 'isolation', and 'biosynthesized'. However, there are noticeable spelling and word-choice errors throughout the text, including 'environement' instead of 'environment', 'cardon' instead of 'carbon', 'delived' instead of 'delivered', 'Therafter' instead of 'Thereafter', and 'gaes' instead of 'gases'. Additionally, some collocations are slightly unnatural, such as 'microbes addition' instead of 'the addition of microbes'. Because these errors do not impede communication but occur regularly, the vocabulary profile fits Band 6.

Grammatical Range and Accuracy: Band 6.0

The writer attempts a mix of simple and complex sentence forms, incorporating relative clauses and participial phrases (e.g., 'resulting in the isolation of sugars needed for the biofuel synthesis'). There are, however, several grammatical errors and awkward phrasing choices, such as 'where finally production of ethanol after microbes addition', missing articles ('for the growth of plant', 'by vehicle'), and repetitive phrasing ('for the growth of plants and trees'). Punctuation is also slightly flawed in places, such as missing spaces after commas. Although these errors rarely impede communication, they prevent the grammar score from reaching Band 7, making Band 6 a more accurate reflection of control.

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

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