Band 4.5 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.5 · Cambridge IELTS 12 · 2026-09-03
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 is about the energy production through geothermal method.
Procedure
1:The cold water is pumped down to the injection well which is 4.5km in depth.The water flows through the geothermal zone which is also called hot rocks .
2:The product of hot rocks enters to the "The production well".Here the water is pumped up to condenser.
3:In the condenser the stream is produced.The condenser condenses the water which is hot and this hot water comes out from production well.Now the water is in stream form.
4:This is one of most important part of system.Here the energy conversion takes place .it consist turbine and generator.
The turbine is powered by the stream .The turbine it's work and then transfer the product to the generator.Now the generator is powered by the turbine and produces electricity.
Electricity is served to the electricity houses .The method of conversion of geothermal energy into electrify is a big step in the production.
The condenser converts the hot water into stream and the two steps the injected well and production well works opposite.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 4.0 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 5.0 |
| Grammatical Range and Accuracy | 5.0 |
| Overall | 4.5 |
Task Achievement / Task Response — Band 4.0
The response attempts to describe the geothermal energy process but fails to meet the requirements of an Academic Task 1 report. The format is highly inappropriate, using a numbered list rather than a cohesive essay structure. While the main stages are identified, the description is fragmented and lacks an overview or a clear summary of the process. The information is presented as a series of instructions rather than a report on a diagram. To improve, you must write in paragraphs, provide a clear introductory overview of the process, and synthesize the information rather than simply listing steps.
Coherence and Cohesion — Band 4.0
The response lacks logical paragraphing and cohesive devices. By using a numbered list, the text fails to demonstrate the ability to organize information into a coherent report. There is no clear progression of ideas; instead, the text reads like a set of disjointed notes. Transitions between sentences are missing, and the referencing is often unclear, such as in the final paragraph where the connection between the condenser and the wells is confusing. To improve, you should use linking words like 'subsequently', 'following this', and 'as a result' to connect your sentences into a fluid narrative.
Lexical Resource — Band 5.0
The vocabulary is limited and repetitive, often relying on basic terms like 'product', 'part', and 'works'. There are also significant errors in word choice and spelling, such as 'stream' instead of 'steam' and 'electrify' instead of 'electricity'. The phrasing is often awkward, such as 'electricity houses' instead of 'the power grid' or 'national grid'. While the technical terms 'turbine', 'generator', and 'condenser' are used, they are not integrated into a sophisticated or precise academic register. You need to focus on using more accurate terminology and improving your spelling to convey information clearly.
Grammatical Range and Accuracy — Band 5.0
The grammatical range is very limited, consisting mostly of simple, repetitive sentence structures. There are frequent errors in articles ('the stream', 'the condenser'), subject-verb agreement, and sentence construction (e.g., 'The turbine it's work'). Punctuation is also inconsistent, with missing spaces after periods and incorrect capitalization. The lack of complex sentence structures prevents the demonstration of higher-level grammatical control. To improve, focus on using a variety of sentence types, such as passive voice constructions, which are essential for describing technical processes, and ensure that your basic sentence structure is grammatically sound.
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