Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · Cambridge IELTS 12 · 2026-09-20
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 diagram illustrates the process of producing Generator Turbine,a type of electricity.Overall,Generator Turbine productioin follows a cyclical pattern and involves five main stages,which include cold water,The injection well,The production well,condenser,and Generator Turbine.
The process begins when cold water pumped down under the ground of land.after being the injection well through to geothermal zone and after that the production well lift up hot water pumped,which is condenser process to steam produce power by steam air pressure and its considerable amount of time after that charge to turbine motor and produce electricity into the tower to build the tower generator.
When geothermal power plant is genrated as electricity released into cold water and hot water before and after the injection well underground into the hot rocks.condenser produce steam air pressure after that produces electricity into the generator and produce amounts of power of turbine and connected with the tower and released electricity and build high tower of geothermal power plant.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 4.5 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 4.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 4.0 |
Task Achievement / Task Response — Band 4.5
The student attempts to describe the geothermal energy process, but the response suffers from major comprehension and reporting issues. While an overview is attempted in the first paragraph, it contains bizarre misinterpretations, such as referring to the process as 'Generator Turbine, a type of electricity'. Important details from the diagram, such as the 4.5 km depth and the cyclical nature involving injection and production wells, are poorly articulated. The description of the stages in the body paragraphs is extremely confusing, repetitive, and fails to accurately trace the sequence from cold water down to the hot rocks, up through the production well, and into the condenser, turbine, and generator. Consequently, the task is only partially addressed.
Coherence and Cohesion — Band 4.0
The response is divided into three paragraphs, including an introduction and two body paragraphs, which provides a basic structural framework. However, there is a severe lack of logical progression and coherence throughout the text. Cohesive devices are used awkwardly or inaccurately, such as 'after being the injection well through to geothermal zone and after that the production well lift up...', making it very difficult to follow the flow of information. Paragraphing is poorly executed, as ideas are jumbled together without clear thematic separation between the physical stages of the plant and the generation of electricity.
Lexical Resource — Band 4.0
The vocabulary used is very basic, repetitive, and often inappropriate. The student heavily relies on repeating terms from the prompt and diagram, such as 'Generator Turbine', 'injection well', and 'cold water', without demonstrating control over word formation or collocation (e.g., 'steam produce power by steam air pressure', 'charge to turbine motor'). There are numerous word-choice errors that obscure meaning and impede communication, placing the lexical range firmly in the lower bands.
Grammatical Range and Accuracy — Band 4.0
Grammatical control is weak throughout the essay. The writing contains frequent serious errors in sentence structure, such as fragments, run-on sentences, and missing verbs (e.g., 'The process begins when cold water pumped down under the ground of land' and 'When geothermal power plant is genrated as electricity released into cold water...'). There is a very limited range of structures, and attempts at complex sentences almost entirely break down grammatically. Punctuation is also erratic, which contributes to the overall strain on the reader.
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