Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · Cambridge IELTS 14 · 2026-07-30

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 6.5)

The process diagram illustrates how electricity is produced in a hydroelectric power station.

overall, electricity is generated in day time by water flows from the high level of reservoir to the reversible turbines generator and then electricity is goes to the power lines. At night, process is reversed with water being pumped back to the high level reservoir.

initially, water from the river stored in the high level of reservoir after that the intake gate is opened in day time and water flows with speed to the reversible turbines side then turbines is spun revers.

Followed by, generator is operated by turbines. Finally, electricity is produced which is transmitted through the power lines to national grid. Subsequently night process is begun with water from low level reservoir, goes to turbines spin process is started and water flows using pump to the river.

AI examiner evaluation

Task Achievement / Task Response — Band 6.0

The response provides a clear overview of the process, identifying the main features of the hydroelectric cycle. However, the response falls short of the 150-word minimum requirement, which negatively impacts the score. While the key stages are mentioned, the description of the night-time cycle is somewhat confusing and lacks the precision required for a higher band. The explanation of the 'reversible' nature of the process is present but could be more clearly articulated to fully satisfy the task requirements. To improve, ensure all stages are described with sufficient detail to meet the word count and provide a more cohesive summary of the mechanical actions involved.

Coherence and Cohesion — Band 6.5

The response is organised into paragraphs, which helps the reader follow the process. However, the use of cohesive devices is somewhat mechanical and occasionally inaccurate. For example, 'Followed by, generator is operated' is grammatically awkward and disrupts the flow. The transition between the day and night cycles is abrupt. To improve, use a wider variety of linking words and phrases (e.g., 'subsequently,' 'in contrast,' 'as a result') to connect ideas more naturally. Ensure that each paragraph has a clear focus and that the progression of the process is logical and easy to follow.

Lexical Resource — Band 6.5

The vocabulary used is generally adequate for the task, with terms like 'reservoir,' 'reversible turbines,' and 'transmitted' being appropriate. However, there are instances of repetitive or imprecise language, such as 'process is reversed' and 'process is started.' The range is somewhat limited, and there is a lack of more sophisticated terminology to describe the mechanical actions. To improve, try to incorporate more precise verbs and nouns related to engineering or technical processes, and avoid repeating the same words in close proximity.

Grammatical Range and Accuracy — Band 6.0

The response contains a mix of simple and complex sentence structures, but there are frequent grammatical errors that occasionally impede clarity. For instance, 'electricity is goes to' is incorrect, and 'turbines is spun revers' contains both a subject-verb agreement error and a spelling error. Punctuation is also inconsistent, with missing articles and awkward phrasing throughout. To improve, focus on subject-verb agreement, correct article usage, and ensuring that passive voice constructions are formed accurately. Proofreading for basic errors will significantly improve the overall accuracy of your writing.

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