Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 12 · 2026-09-12

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 given diagram illustrate the process of hoe to geothermal power is help to make a electricity.

overall, the process start to cold water tank it give injection well and other steps to make a electricity. also, it divide multiple step to making energy from the cold water and at the end of the all process making energy and it ready for use.

According to the given image, the first the cold water in the big size storage container which attach by the big pipe. the pipe are 4.5 km long. second the cold water are in injection well via pipe. the geothermal zone is process the cold water to hot water and give to production well.

Furthermore, third the production well are pumped the hot water in condenser. in addition the condenser given to this steam in turbine. the turbine is attach with generator and turbine are rolling the use of steam and give power to generator. so, the generator made electricity.

AI examiner evaluation

Task Achievement / Task Response — Band 5.0

The response attempts to summarize the geothermal energy diagram, identifying several key stages such as the cold water tank, injection well, geothermal zone, production well, condenser, turbine, and generator. However, the information is presented in a very basic and fragmented manner. The description lacks a clear overview of the overall process, attempting instead to list individual steps with limited integration. Furthermore, some details are mechanically reported rather than effectively summarized. While the student makes an effort to cover the main features, the lack of well-developed comparisons and the superficial treatment of the process place this response at Band 5.0.

Coherence and Cohesion — Band 4.0

The text is organized into four paragraphs, including an introduction and a concluding body structure, but the logical progression and cohesive flow are severely impaired. Phrases like 'According to the given image, the first the cold water' and 'Furthermore, third the production well' demonstrate mechanical, inadequate, and inaccurate cohesive devices. Referencing is frequently unclear, and the mechanical listing of steps ('second', 'third') creates an unnatural and disjointed structure. There is no clear overall progression of ideas, resulting in a score of 4.0 for this criterion.

Lexical Resource — Band 4.0

The vocabulary used is very basic, repetitive, and heavily reliant on direct copying of prompt elements or simple everyday words (e.g., 'big size storage container', 'make a electricity', 'hot water'). There are numerous word-choice and collocation errors, such as 'geothermal zone is process the cold water' and 'turbine are rolling the use of steam'. The range is limited and barely adequate for the task, with frequent errors that strain the reader's understanding, aligning with the Band 4.0 descriptors.

Grammatical Range and Accuracy — Band 4.0

The grammatical structures are extremely limited and frequently faulty. The response contains major structural errors and basic tense/verb agreement issues throughout, such as 'how to geothermal power is help to make a electricity', 'the cold water in the big size storage container which attach by the big pipe', and 'the generator made electricity'. There is a complete lack of accurate complex sentence forms, and punctuation is poorly managed. These persistent errors distort meaning and cause significant difficulty for the reader, placing the grammar at Band 4.0.

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