Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · Cambridge IELTS 12 · 2026-09-14

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)

The rendered pictorial diagram depicts the information about process of the produced electricity from geothermal energy.

Overall, there had been major five stage for develp geothermal power plant which begin with provide cold water and end with create generator turbin.

After analyzing the chart, first step start with cold water which pumped down into underground it about carry 4.5km length moving futher, to create geothermal zone it require injection for transform rocks into hot .

Furthemore, hot rocks which were helpful for water to became hot because prodused well energy water need to became hot this help for balance during pumped when water going outside. On the other hand, this boiling hot water create condenser which became huge amount of steam becuse play significant role to produce energy, after that steam forced turbin to produce power supply throught to electrycity,finally pewered by turbin and create power produce geothermal power plant and end with this stage .

AI examiner evaluation

Task Achievement / Task Response — Band 4.0

The response attempts to summarize the diagram showing how geothermal energy is used to produce electricity. The overall trend or main stages are identified, noting that it begins with cold water and ends with power generation. However, the description of the process is very difficult to follow due to severe language expression issues. While the main components such as cold water, underground injection, hot rocks, steam, and the turbine are mentioned, they are not presented in a clear, accurate reporting sequence. The relationship between the stages is confused, and the mechanical steps are distorted, leading to a partial and inaccurate overview of the source diagram. Consequently, this performance aligns with the Band 4 descriptors.

Coherence and Cohesion — Band 4.0

The text is divided into a short introduction and one massive, unstructured body paragraph, lacking appropriate paragraphing to separate the distinct stages of the cycle. Cohesive devices are either missing or misused, with awkward transitions like 'After analyzing the chart', 'Furthemore', and 'On the other hand' applied inappropriately to a scientific process diagram. There is no clear logical progression; instead, ideas are jammed together in run-on sentences with confusing referencing (e.g., 'this boiling hot water create condenser which became huge amount of steam becuse play significant role'). Information and ideas are not arranged coherently, which strongly corresponds to Band 4.

Lexical Resource — Band 4.0

The vocabulary is extremely basic, repetitive, and plagued by severe word-choice errors and non-standard forms (e.g., 'develp', 'prodused', 'electrycity', 'pewered'). The student attempts less common vocabulary such as 'condenser', 'geothermal zone', and 'turbin', but these are used incorrectly or spelled poorly. Frequent spelling and morphological errors (such as using nouns for verbs and vice versa) severely strain the reader's understanding and obscure the scientific terminology required for Academic Task 1. This falls squarely within the Band 4 descriptor range.

Grammatical Range and Accuracy — Band 4.0

Grammatical control is extremely weak throughout the response. There is a total absence of error-free complex sentences. Most sentences are run-on, fragmented, or structurally collapsed, featuring missing auxiliary verbs, incorrect tenses, and misplaced clauses (e.g., 'Overall, there had been major five stage for develp geothermal power plant which begin with provide cold water and end with create generator turbin.'). Punctuation is virtually absent or incorrectly placed, and basic subject-verb agreement is frequently violated. Errors are pervasive and constantly distort the meaning, matching the criteria for a Band 4 score.

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

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.