Band 6.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 6.0 · Cambridge IELTS 12 · 2026-08-25
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 given diagram illustrates the information about using geothermal power plant for electricity production.
Overall, producing electricity via geothermal energy involves 4 different steps and tools which starts from cold water and ending at generator.
To commence with, this process starts with cold water stored in a tub that pumped down in a 4.5 km long pipe that reach at the injection well, where water is processed under geothermal zone to heat it up with the help of hot rocks.
In addition, the third step involves the production well that helps to pump the hot water upwards with a pressor through a pipe followed by condenser where hot water is kept. Condenser turns the hot water into steam. In the final stage, turbine is involve that is powered by steam linked to a generator which is powered by turbine where electricity is produced which goes directly to grids for use.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 6.0 |
| Coherence and Cohesion | 6.5 |
| Lexical Resource | 6.0 |
| Grammatical Range and Accuracy | 5.5 |
| Overall | 6.0 |
Task Achievement / Task Response — Band 6.0
The response covers the main stages of the geothermal energy process, from the injection of cold water to the final electricity generation. However, the description is somewhat mechanical and lacks a clear overview of the cyclical nature of the process. While all key features are mentioned, the explanation of the 'condenser' is technically inaccurate based on the provided diagram, as the diagram shows steam driving the turbine, not the condenser turning water into steam. The summary is functional but lacks the analytical depth required for a higher band score.
Coherence and Cohesion — Band 6.5
The response is organized into logical paragraphs, moving from an introduction to the process steps. Cohesive devices such as 'To commence with', 'In addition', and 'In the final stage' are used to guide the reader. However, the flow between sentences is occasionally repetitive, and some transitions feel mechanical. The referencing is generally clear, though the connection between the 'production well' and the subsequent steps could be more fluidly integrated to improve the overall progression of the report.
Lexical Resource — Band 6.0
The vocabulary is adequate for the task, using terms like 'geothermal zone', 'injection well', and 'generator'. However, there are some inaccuracies in word choice, such as 'pressor' (likely intended as 'pressure') and 'tub' (a more precise term would be 'reservoir' or 'tank'). The range of vocabulary is somewhat limited, relying on basic descriptors. To reach a higher band, the student should incorporate more precise technical terminology and demonstrate a better grasp of collocations related to industrial processes.
Grammatical Range and Accuracy — Band 5.5
The response contains a mix of simple and complex sentence structures. There are several grammatical errors, such as 'which starts from cold water and ending at generator' (parallelism error) and 'turbine is involve' (verb form error). Additionally, there are missing articles throughout the text, such as 'in a tub that pumped down' and 'in the final stage, turbine is involve'. While these errors do not prevent the reader from understanding the process, they occur frequently enough to limit the score.
See this exact question answered at other band scores — the same prompt compared across bands.
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