Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 14 · 2026-07-28

IELTS Writing Task 1 question

The diagram below shows how electricity is generated in a hydroelectric power station.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 6.0)

The diagram depicts that the process of how electricity is generated in a hydroelectric power station during two time periods: day and night.

In the begining, water is stored into a high-level reservoir which is come from a river. After that, Dam is open during the day to flow of water towards. Subsequently, water is contain into a reversible tubines which operate generator during the day intake. Electricity is passed to the power lines and approched at national grid.

In the night, pump water into low-level reservoir to high level reservoir. Then, water is flow from turbine to the dam via pumping. Dam is closed during the night. Consequently, this process is repeated further.

Overall, it is evident that, the whole process devided into to intake like day as well as night. In the day, water goes to high-level reservoir to power station and produced electricity which used for national grid. Whereas, during the night, the reverse process pumping this water towards to the dam.

AI examiner evaluation

Task Achievement / Task Response — Band 6.0

The response covers the main features of the hydroelectric power station process, including the day and night cycles. However, the description of the process is somewhat inaccurate and confusing. For instance, the text states that the dam is 'open' and 'closed' in a way that does not clearly explain the flow of water, and the description of the pumping process is technically unclear. While the main features are identified, the lack of precision in describing the mechanical steps means the information is not fully or accurately conveyed. The overview is present but lacks clarity regarding the cyclical nature of the system.

Coherence and Cohesion — Band 6.0

The response is organised into paragraphs, which helps the reader follow the structure. However, the use of cohesive devices is often mechanical or inaccurate, such as 'In the begining' and 'Subsequently'. The logical progression between sentences is frequently interrupted by grammatical errors, making the flow feel disjointed. Referencing is sometimes unclear, particularly in the final paragraph where the explanation of the reverse process is confusing. While there is an overall attempt at a logical structure, the lack of sophisticated linking words and the repetitive nature of the phrasing limit the coherence.

Lexical Resource — Band 5.5

The vocabulary is limited and often repetitive. There are several instances of incorrect word choice and collocation, such as 'water is contain into a reversible tubines' and 'approched at national grid'. The student struggles to use precise technical terminology appropriate for a process description. While the meaning is generally understandable, the errors in word form (e.g., 'produced' instead of 'produces') and collocation are frequent enough to detract from the quality of the writing. A wider range of vocabulary related to mechanical processes is needed to achieve a higher band.

Grammatical Range and Accuracy — Band 5.5

The response contains frequent grammatical errors that affect readability. There are issues with subject-verb agreement ('water is flow', 'Dam is open'), incorrect verb tenses, and missing articles. The sentence structures are mostly simple, and attempts at more complex sentences often result in errors, such as 'the process of how electricity is generated... during two time periods'. Punctuation is generally acceptable, but the overall control of grammar is weak, with errors occurring in almost every sentence. To improve, the student should focus on basic sentence construction and verb tense consistency.

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.