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 diagram depicts the usage of geothermal energy to generate electricity.
Overall, it is clear that geothermal zones performs a crucial role in converting cold water into hot water needed to generate electricity . In addition the injection well or production well both are responsible for the injection or extraction of water respectively.
Geothermal energy plays a vital role in production of electricity. Moreover, generator is the key component to produce electricity from the steam. It comprises a turbine that could power it. Conversely, tower is the layout where the electricity distributed all over the area.
On the other hand, there is a 4.5km straight portion where the cold water is pumped down into injection well. As compared to the production well where hot water is pumped. Subsequently, the setup where a boiling water transformed into steam inside the condenser . Furthermore, turbine is a core mechanism where a pressurized steam is converted into electric energy via generator.
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 response attempts to describe the geothermal energy process, but it falls short in fully capturing and reporting the main features and sequence of the diagram. While it mentions key elements such as the injection well, production well, condenser, turbine, and generator, the overview and body paragraphs lack a clear, logical summarisation of how the cycle actually flows from cold water down to the hot rocks and back up as steam. Furthermore, some descriptions are inaccurate or confusing, such as 'tower is the layout where the electricity distributed all over the area', which misinterprets the transmission pylon. The depth of 4.5 km is correctly identified, but overall the selection and reporting of data points are somewhat disjointed and miss crucial mechanical links in the cyclical process, placing this performance in the Band 5 category.
Coherence and Cohesion: Band 5.0
The response is divided into four short paragraphs, showing an attempt at paragraphing. However, the logical progression within and between paragraphs is quite weak. Cohesive devices are used mechanically or awkwardly, such as 'In addition the injection well or production well both are responsible', 'Conversely, tower is...', and 'On the other hand, there is a 4.5km straight portion...'. The use of contrast markers like 'Conversely' and 'On the other hand' is inappropriate here since the details presented are sequential or supplementary rather than contrasting. Referencing is sometimes unclear, and the overall arrangement feels disjointed, leading to a Band 5 score for Coherence and Cohesion.
Lexical Resource: Band 5.0
The student demonstrates an adequate vocabulary for addressing the topic, successfully employing words like 'geothermal', 'generator', 'turbine', 'condenser', and 'injection well'. However, there are noticeable word choice and collocation errors, such as 'geothermal zones performs' (subject-verb agreement combined with collocation), 'production of electricity' missing articles, and referring to the transmission pylon as a 'tower where the electricity distributed'. Attempts at less common vocabulary are constrained by awkward phrasing (e.g., 'the setup where a boiling water transformed into steam'). Vocabulary is sufficient for basic task communication but contains frequent inaccuracies, fitting the Band 5 descriptor.
Grammatical Range and Accuracy: Band 5.0
The essay displays a mix of simple and some attempted complex sentence structures, but grammatical accuracy is low. There are frequent errors in verb forms, tense consistency, and article usage. Examples include 'geothermal zones performs' (plural subject with singular verb), 'where the electricity distributed' (missing passive auxiliary 'is'), 'a boiling water transformed' (incorrect article and tense), and 'hot water is pumped' standing as a fragmented or awkwardly truncated relative clause. Punctuation and spacing issues also appear around commas and extra spaces. These persistent errors cause some difficulty for the reader and reflect a Band 5 level of grammatical control.
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