Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 14 · 2026-09-01

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 given diagram demonstrates the mode of action of a hydroelectric power station where electricity is generated by the flow of water. This process has been a very effective method of producing electricity for decades.

The bigger picture of diagram shows us that the hydroelectric power station works by two mechanisms . During day time , water moves from area of higher water reservoir where actually electricity is generated where as , night time mechanism is totally opposite to it . At night , water moves from region of lower level water reservoir to higher level reservoir . Basically it is reverse process to the day time process .

First and foremost , water moves to dam directly from river from where it is than moved to generator through a water intake that is closed at night but opened during day time. At generator , the flow of water runs turbine that consequently genrates electricity that is than brought to national grid by power lines . And the water runs to lower level reservior.

Oppositely, the reverse process take place at night during which the water is moved up to the higher level reservior by reversible turbines . These reversible turbines pump water to the higher level resevior , from where the next day process starts again .

Ultimately , it is seen that an equilibrium is developed between the high level water reserviour and low level reserviour.

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 is somewhat repetitive and lacks precision in technical terminology. For instance, the explanation of the 'equilibrium' is vague and does not accurately reflect the mechanical process shown in the diagram. While the main features are identified, the overview is slightly weak, and the distinction between the two phases could be more clearly integrated to show the cyclical nature of the system. To reach a higher band, ensure that the relationship between the components (e.g., the pump-turbine and the reservoirs) is described with greater technical accuracy.

Coherence and Cohesion — Band 6.0

The essay is organized into logical paragraphs, which helps the reader follow the process. However, the use of cohesive devices is sometimes mechanical or repetitive, such as the frequent use of 'at night' and 'during day time'. The transition between the two processes could be smoother. While there is a clear attempt to sequence the information, some sentences feel disjointed, and the referencing (e.g., 'this process') is occasionally ambiguous. Improving the variety of linking words and ensuring that each paragraph has a clear thematic focus would enhance the overall flow.

Lexical Resource — Band 5.5

The vocabulary is generally adequate for the task, but it lacks the precision required for a higher band. There are several spelling errors, such as 'genrates', 'reservior', and 'resevior', which occur repeatedly. The range of vocabulary is somewhat limited, relying on basic descriptors like 'bigger picture' and 'mode of action'. To improve, you should incorporate more precise technical terms related to engineering or energy production, such as 'hydroelectric generation', 'reversible pump-turbine', or 'potential energy', and ensure consistent spelling throughout the text.

Grammatical Range and Accuracy — Band 5.5

The response contains a mix of simple and complex sentence structures. However, there are frequent grammatical errors, particularly with articles ('the' is often missing or misused) and prepositions. Examples include 'from area of higher water reservoir' and 'it is than moved'. Additionally, there are punctuation issues, such as unnecessary spaces before commas. While the meaning is generally clear, the frequency of these minor errors prevents the writing from being considered highly accurate. Focusing on subject-verb agreement and the correct usage of articles would significantly improve the quality of your sentences.

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