Band 5.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 5.0 · Cambridge IELTS 12 · 2026-09-26
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 5.0)
The provided linear chart illustrates how geothermal energy is produced by using cold water.
Looking from an overall perspective, it is readily apparent that the linear graph consist of five different stages, beginning with the storage of cold water and ends up with generator.
Initially, the cold water is stored into some blocks before injecting to the well. The cold water is depth from the well is about 4.5 km. The next step, the injection well moved to the production well by using a geothermal zone, it called as hot rocks. After this stage, the production well followed an upwards trend and stayed in condenser with the help of hot water pumpes.
Subsequently, during the condenser stage, where the heat is produced and this can be beneficial for opreating the turbine. Afterwards, The turbine is on by steam, which comes from the condenser. Finally, the generator are continue to flow or powered by turbine and generates the electricity.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 5.0 |
| Coherence and Cohesion | 5.0 |
| Lexical Resource | 5.0 |
| Grammatical Range and Accuracy | 5.0 |
| Overall | 5.0 |
Task Achievement / Task Response: Band 5.0
The student attempts to summarise the process diagram showing how geothermal energy is produced, identifying key stages such as the injection well, geothermal zone, production well, condenser, turbine, and generator. An overview is provided, stating that the process consists of five stages. However, there are notable inaccuracies in reading the diagram, such as stating that 'the injection well moved to the production well' and describing the cold water storage as 'blocks'. Furthermore, the explanation of the mechanical and thermal processes is often confusing and imprecise (e.g., describing the water depth as 'The cold water is depth from the well is about 4.5 km'). While the main features are touched upon, the description lacks clarity and precision in reporting the actual mechanics of the plant.
Coherence and Cohesion: Band 5.0
The response is organised into paragraphs, beginning with an introduction, followed by an overview, and breaking down the stages across two body paragraphs. Transitional devices are used to signal sequence, such as 'Initially', 'The next step', and 'Subsequently'. However, the logical progression is frequently disrupted by awkward referencing and cohesion errors (e.g., 'ends up with generator', 'stayed in condenser', 'the generator are continue to flow'). Paragraphing is present, but internal cohesion within sentences is often weak or mechanical, impeding smooth reading.
Lexical Resource: Band 5.0
The vocabulary used is relatively basic and repetitive, relying heavily on terms lifted directly from the prompt and diagram, such as 'cold water', 'geothermal zone', 'hot rocks', 'condenser', 'turbine', and 'generator'. There are noticeable lexical errors and awkward word choices throughout the text, such as 'linear chart', 'consist', 'opreating', and incorrect prepositions ('stored into some blocks before injecting to the well'). The range of vocabulary is limited and minimally adequate for the task, with frequent slips that reflect a lack of precision.
Grammatical Range and Accuracy: Band 5.0
The text contains a mix of simple and attempted complex sentence structures, but control over grammar is weak. There are frequent grammatical errors, including subject-verb agreement issues ('the generator are continue to flow'), missing prepositions, and badly formed clauses ('The cold water is depth from the well is about 4.5 km'). Non-standard structures and tense inconsistencies (mixing present and past or awkward passive constructions) appear throughout, which causes difficulty for the reader and places the response firmly in the Band 5 range for grammar.
See this exact question answered at other band scores. The same prompt compared across bands.
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