Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 12 · 2026-10-29

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 4.5)

The electronics diagram illustrate how Geothermal solar energy is used to generate electricity.

Overall, Geothermal power plant it is the main point of the electrical cold water the injection well the production well condenser steam.

Firstly, Generators turbine electric generate the cold water 4.5 kilometers cold water pumped down .The injection well going to geothermal zone (hot rocks) then the production well production hot water pumped up after that the condenser after that steam it is released smoke . The generators it is the most important part of machine produced by turbine and producers electricity. The turbine powered by steam it was rotet the work of other parts in the machine.

AI examiner evaluation

Task Achievement / Task Response: Band 4.0

You identify several relevant components, including the injection well, geothermal zone, production well, condenser, steam and turbine, and you mention the 4.5-kilometre depth. However, the response only minimally summarises the process: the overview is unclear, and the sequence from cold water to electricity is not accurately explained. For example, “Generators turbine electric generate the cold water” confuses the stages, while the generator’s role in producing electricity is only partly conveyed. The description also calls the released steam “smoke,” which misrepresents the diagram. The response is 111 words, below the required 150, so it lacks the space needed to report the main stages clearly. Organise the process from water injection through to electricity generation and include a concise, accurate overview.

Coherence and Cohesion: Band 4.5

There is a basic attempt to organise the response, with “Overall” introducing a summary and “Firstly” and “then” signalling sequence. The reader can also recognise some of the process components. However, the overall progression is difficult to follow because stages are crowded into one long passage and connections between them are unclear. The overview lists items rather than explaining how they relate, and repeated phrases such as “after that” do not make the sequence precise. Separate the overview from the detailed stages, then use clear links such as “Next,” “As the water rises,” and “Finally.” Shorter sentences, each describing one stage, would make the process easier to understand.

Lexical Resource: Band 5.0

You use several task-relevant terms, including “injection well,” “geothermal zone,” “production well,” “condenser,” “steam” and “turbine.” This gives the response some appropriate process vocabulary. However, the range is limited and some word choices make the meaning unclear: “electronics diagram” is not an accurate description, “Geothermal solar energy” mixes different energy sources, and “smoke” is not the correct term for the output shown. Phrases such as “the main point of the electrical” and “producers electricity” are also imprecise. Aim for accurate, conventional process language and avoid combining unrelated terms. Reusing the diagram’s labels is a useful way to improve precision.

Grammatical Range and Accuracy: Band 4.5

The response attempts to use sequencing clauses, as in “then the production well … after that the condenser,” and includes some simple statements about the equipment. However, sentence structures are very limited, and frequent errors in agreement, articles, verb forms and sentence construction make several ideas hard to interpret. For example, “The electronics diagram illustrate” has a subject–verb agreement error, while “Geothermal power plant it is” uses an unnecessary pronoun and lacks a clear grammatical structure. The long sentence beginning “Firstly” also joins several stages without reliable punctuation. Practise writing one complete sentence per stage, checking that each has a clear subject and verb, and use present simple forms to describe how the process works.

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