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 diagram provides about information how geothermal energy is used to produce electricity.Overall the cold water pumped down through the injection well process and geothermal zone and then go to the production well process the hot water pumped up and converted to the condenser and steam are enter in turbine and than go to generator convert the powered by turbine and produces electricity.Cold water enter to 4.5km tube well for hoting. Cold water pumped down the tube well for hot rocks process and geothermal zone as the injection well.The process started hot water pumped up for the production well after the hot water pumped up and the goes the condenser after hitness and than enter turbin for the powered by steam and than go generater for the powered by turbin and produces electricity. The generator produced the electricity by turbin. The Turbine steam the condenser and than process by generator to produce electricity.

AI examiner evaluation

Task Achievement / Task Response: Band 5.0

You identify the main route from cold water being pumped underground to electricity generation, and you include the key 4.5 km depth. However, the account is only partial and several stages are unclear or inaccurately described: the water is heated as it passes through hot rocks, then rises through the production well; it is not the condenser that converts the water into steam as your wording suggests. The overview repeats the sequence rather than clearly summarising the process’s main stages. The response also falls short of the 150-word minimum: it contains 146 words, with eight words copied from the prompt excluded. To improve, describe each stage once, accurately, and add a concise overview of the complete process.

Coherence and Cohesion: Band 4.0

There is an attempt to follow the process from the injection well through to the generator, so the reader can recognise the general sequence. However, the ideas are not arranged coherently enough: the overview and body repeat much of the same information, and the final sentences return to the turbine and generator without adding a clear new stage. Connections between steps are often difficult to follow, as in “after hitness and than enter turbin.” Use a clear overview followed by a step-by-step account, with one sentence for each stage. Linking expressions such as “next,” “after passing through,” and “finally” can make the progression easier to track without repeating details.

Lexical Resource: Band 5.0

You use some relevant process vocabulary, including “injection well,” “production well,” “geothermal zone,” “condenser,” “turbine,” and “generator.” This gives the response a minimally adequate set of task-specific terms. However, vocabulary is repetitive, and several word choices or forms make the meaning difficult to understand: “about information,” “for hoting,” “after hitness,” and “The Turbine steam the condenser.” Use precise process verbs such as “heat,” “rise,” “release,” and “drive,” and avoid repeating “powered by” when describing the same mechanism. Check spelling and word forms, particularly “heating,” “turbine,” and “generator,” so technical details are communicated clearly.

Grammatical Range and Accuracy: Band 4.5

The response attempts to describe a sequence and includes some longer sentence structures, but these are often faulty, while sentence patterns are limited overall. Errors in verb forms and sentence construction appear throughout, for example, “Cold water enter,” “hot water pumped up,” and “The generator produced the electricity by turbin.” Articles and prepositions are also frequently missing or incorrectly used, and punctuation does not consistently separate the stages. These problems sometimes make it hard to identify what happens at each point. Practise writing short, complete sentences with a clear subject and verb—for example, “Cold water is pumped down the injection well”—then connect them with accurate sequencing phrases.

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