Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · Cambridge IELTS 12 · 2026-10-08

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 4.0)

Their is the illistrate the diagram how geothermal energy is used to produce electricity.

their is the geotheral power plant hear the bulk of cold water supply going through the under ground their is 4.5 km in deep and secondly, the injection well gose through the gelothermal zone hot rocks and going upward diraction into the condenser and hare we see the the condenser powered by steam and doing turbin and powered by turbine and produces electricity through the generator to the electrical power tower this the the proces to the geothermal power plant and this the the power supply to the electrical power

AI examiner evaluation

Task Achievement / Task Response: Band 4.0

You identify the general subject and include several relevant stages: cold water is sent underground, heated by hot rocks, brought back up, and used in a process involving steam, a turbine and a generator. The 4.5 km depth is also reported correctly. However, the account is minimal and does not clearly explain the full sequence or give a clear overview of how the stages combine to generate electricity. Some relationships are confused—for example, the condenser is not powered by steam; it releases steam, which then powers the turbine. The response also falls short of the required 150 words, with 96 words counted (excluding eight copied prompt words). Develop each stage accurately and include a concise overview.

Coherence and Cohesion: Band 4.0

There is a basic attempt to present the process in sequence, using phrases such as “secondly” and “going upward direction,” and the reader can recognise some movement from underground to the surface and then to electricity generation. However, the response is essentially one long, loosely connected sentence, so the stages and their relationships are difficult to follow. Repeated “their is” and “and” do not provide clear links, while “this the the process” does not establish a useful conclusion. Organise the description into short paragraphs or clearly separated stages, and use sequence markers such as “first,” “next,” and “finally” only where they clarify the order.

Lexical Resource: Band 4.5

The response uses a small set of relevant process words, including “cold water,” “injection well,” “geothermal zone,” “condenser,” “turbine,” and “generator.” These show some awareness of the diagram’s technical vocabulary. However, the range is basic and several spelling errors make key terms harder to recognise, such as “illistrate,” “geotheral,” and “gelothermal.” Some word combinations are also unclear or unsuitable, including “bulk of cold water supply” and “doing turbin.” Use the diagram’s labels accurately and choose precise process verbs and collocations. For example, describe water as being “pumped down” and “heated,” and say that steam “drives” the turbine.

Grammatical Range and Accuracy: Band 4.0

The response attempts to connect several stages in a sentence, but it shows very limited control of sentence structure, and frequent errors sometimes obscure the intended meaning. Examples include “Their is the illistrate the diagram” and “the injection well gose through the gelothermal zone … and going upward,” where sentence construction and verb forms are faulty. Articles and agreement are also problematic in “the condenser powered by steam,” and repeated words such as “the the” disrupt readability. Most ideas are joined with “and” rather than expressed through controlled simple sentences. Practise writing one complete sentence for each stage, checking subject–verb agreement, articles, and consistent verb forms.

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