Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · Cambridge IELTS 19 · 2026-07-29

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 6.5)

The diagram below illustrates the method of manufacturing of a biofuel named ethanol.

To summarize, the energy from nature make plants to grow that can be harvested to produce cellulose, after further processing sugar is made; with the addition of microbes, ethanol is produced which is used in vehicles to produce carbon dioxide.

The energy gained from sunlight and carbon dioxide consumed by plants which cause their development and growth. After they are fully grown, they are harvested by farmers with the help of several machinery. In addition, the harvested plants go through pre-processing for the production of the cellulose. Further processing is done to make sugars then this sugar is added with microbes to produce ethanol. This produced ethanol is used in various vehicles such as airplanes, cars and trains for travelling. The carbon dioxide produced from these vehicles release in the air which is again used in the production of energy. this process is a repetitive process that goes on for the advantage of individuals.

AI examiner evaluation

Task Achievement / Task Response — Band 6.5

The response provides a good overview of the process of ethanol production, describing the stages from plant growth to the production of ethanol. However, it lacks certain specific details that would enhance clarity and completeness, such as not indicating the source of cellulose or explicitly stating the steps of pre-processing and how they convert to sugar. Additionally, the explanation of the carbon dioxide role can be misleading, as it implies a closed-loop system which is not fully accurate. Thus, while the main features are identified, the response could benefit from a clearer structure and more precise information.

Coherence and Cohesion — Band 6.0

The coherence of the text is somewhat hindered by awkward phrasing and unclear connections between ideas. For instance, the sentence "The energy gained from sunlight and carbon dioxide consumed by plants which cause their development" lacks appropriate conjunctions for better flow. Moreover, the response transitions from one stage to another, but it does so with limited clarity, making it hard for readers to follow the overall process. Consider using clearer sequence markers and transitions to enhance the logical flow, such as "first," "next," and "finally."

Lexical Resource — Band 6.5

The vocabulary used in the response shows an attempt to describe the process, but it suffers from repetitiveness and lack of precision. Terms like "energy from nature" and "several machinery" are rather vague. More specific terms related to biofuel production would enhance the lexical resource. For example, instead of "energy from nature," a more precise term like "photosynthetic energy" could be used, and replacing "machinery" with "equipment" may sound more appropriate.

Grammatical Range and Accuracy — Band 6.0

Grammatical accuracy is variable in the response, with several errors that may impact clarity. For example, the phrase "the harvested plants go through pre-processing for the production of the cellulose" should omit 'the' before 'cellulose.' Additionally, verb forms like "make plants to grow" should be corrected to "cause plants to grow" for better grammatical accuracy. While there is a range of sentence structures, many sentences are overly complex or incorrectly structured, which detracts from the overall communication of ideas.

Overall feedback

Your response demonstrates a good understanding of the ethanol production process, capturing the essential stages from plant growth to ethanol use. However, clarity and precision in your descriptions can be improved. Focus on presenting each step more distinctly, perhaps by using transition phrases to guide the reader through the process. Pay attention to specific vocabulary related to biofuel production to enhance your lexical resource. Lastly, working on grammatical accuracy will strengthen your writing, especially in regard to sentence structure and verb forms. Continue practicing these areas to advance your writing skills further.

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