Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 12 · 2026-08-19

IELTS Writing Task 1 question

The diagram below shows how geothermal energy is used to produce electricity.

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

Student answer (Band 6.0)

The diagram shows the process of generate electricity by using geothermal energy.

Overall, the five main stages in the process. Cold water is pumped underground, heated by hot rocks, broght back to the surface, changed into steam, and finally used to generate electricity.

At the first stage, cold water is storage above tyhe ground,. It is then pumped down to a depth of 4.5 km through the injection well. After reaching the geothermal zone, the water passes through the hot rocks. As a result, the temperature of the water increases significantly.

In the next stage, the hot water is pumped upwards through a production well. It reaches the condensor, when it is converted into steam. The steam is then directed towards a turbine. The force of the steam makes the turbine rotate. Finally, the rotating turbine powers a generator. The generator produce electricity, and in supplied through power lines.

In this way, natural heat water from underground rocks is used to produce electricity and it is a siple and continuous process.

AI examiner evaluation

Task Achievement / Task Response — Band 6.0

The response successfully identifies the main stages of the geothermal energy process. You have provided a clear overview and followed the sequence of events logically from the injection of water to the production of electricity. However, the response lacks a more analytical approach; for instance, it does not explicitly mention the depth of 4.5 km as a key feature or highlight the cyclical nature of the process effectively. While all parts of the task are addressed, the description is somewhat mechanical and could benefit from more precise reporting of the technical features shown in the diagram to reach a higher band.

Coherence and Cohesion — Band 6.0

The essay is logically organized into an introduction, an overview, and two body paragraphs. You use transition signals such as 'At the first stage', 'In the next stage', and 'Finally' to guide the reader through the process. However, some cohesive devices are used in a slightly mechanical or repetitive way. Additionally, there are minor issues with referencing; for example, the sentence 'Overall, the five main stages in the process' is a fragment and lacks a verb, which disrupts the flow. Paragraphing is used appropriately to separate the distinct phases of the energy production cycle.

Lexical Resource — Band 5.5

You demonstrate an adequate range of vocabulary for the task, using terms like 'injection well', 'production well', and 'turbine' correctly. However, there are several spelling errors, such as 'broght', 'tyhe', 'condensor', and 'siple', which detract from the overall quality. Furthermore, the phrasing 'natural heat water' is unnatural and imprecise. To improve, you should focus on more accurate collocations and ensure that technical terms are spelled correctly. While the vocabulary is sufficient to convey the process, the errors prevent a higher score.

Grammatical Range and Accuracy — Band 5.5

You use a mix of simple and complex sentence structures, such as 'The steam is then directed towards a turbine.' However, there are frequent grammatical errors, including subject-verb agreement issues ('The generator produce electricity', 'it is in supplied') and punctuation errors (e.g., the comma after 'ground'). The sentence 'Overall, the five main stages in the process' is grammatically incomplete. While these errors do not impede the reader's understanding of the process, they are frequent enough to limit the score to a 6.0.

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