Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 12 · 2026-09-21

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 illustrates how electricity is produced from geothermal energy.

Overall,It can be seen that this process is consist of several stages from cold water to steam and produced electricity.

Firstly, it is compulsory to made structure under ground deep 4.5 kilometers. Then put cold water in the hole into injection well after that water went to thermal zone hot ro cks. From there a hot pump pull the water up side to the production well further more it went for the 4th step there condenser make steam to eventually the steam went through at the end main part include steam run turbines which help generator to start powered by turbine then supply to city republic through rezerwire. so this the whole process how electricity is produced from the geothermal energy.

AI examiner evaluation

Task Achievement / Task Response — Band 5.0

The student attempts to summarise the diagram showing how geothermal energy produces electricity, covering the main stages from cold water injection to steam generation and turbine operation. However, the response fails to meet the minimum word count requirement of 150 words, stopping at 131 words, which negatively impacts task achievement. Furthermore, several key details are described somewhat vaguely or inaccurately, such as the mention of 'hot pump' instead of the production well. While an overview is attempted ('this process is consist of several stages'), it is basic. To reach a higher band, the student must develop the description more fully, ensure accurate reporting of all visual features, and write at least the minimum required word count.

Coherence and Cohesion — Band 4.5

The text suffers from poor paragraphing and a lack of clear overall structure, presented almost entirely as a single dense block. Cohesive devices are either missing, mechanical, or misused, such as 'Then put cold water in the hole into injection well after that water went to thermal zone hot ro cks.' The progression of ideas is difficult to follow at times due to run-on sentences and punctuation errors, such as missing periods and commas. While the chronological sequence of the process is somewhat discernible, the logical organization requires significant improvement to achieve a clearer flow.

Lexical Resource — Band 4.5

The vocabulary used is basic and repetitive, with several errors in word choice and word formation, such as 'is consist of' instead of 'consists of', 'compulsory to made structure' instead of 'necessary to construct', and 'ro cks' split with a space. Other awkward phrases include 'hot pump pull the water up side' and 'city republic through rezerwire'. These lexical errors and limitations occasionally impede communication and restrict the response to a restricted range of everyday words, falling short of the flexibility needed for higher bands.

Grammatical Range and Accuracy — Band 4.0

Grammatical control is weak throughout the response, featuring frequent basic errors. Examples include 'it is compulsory to made' (incorrect infinitive form), 'under ground deep 4.5 kilometers' (faulty word order and structure), and run-on sentences lacking appropriate punctuation. There is a very limited range of grammatical structures attempted, and most complex attempts contain major errors. Punctuation is largely neglected, with sentences frequently strung together using coordinating words without proper separation. These persistent errors cause noticeable difficulty for the reader.

See this exact question answered at other band scores — the same prompt compared across bands.

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