Band 4.5 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.5 · Cambridge IELTS 12 · 2026-08-06
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 linear chart illustrates the process of making electricity by useing the geothermal energy.
Overall, it can be cliearly seen that it is a linear chart of produceing the electricity, it has 5 stages, which starts with collecting the cold water and ends with generate elecricity useing generator.
Initialy, cold water is taken. Subsiquently, pumped down it into geothermal zone by the injection well. Afterwords, water hitted by hot rocks which stored into geothermal zone and suplly using the production well. Then the hot water converted into steam using condenser. Finaly, turbine roteted with steam and electrycity generate by generator.
This process need multiple objects, like generator, turbine and condenser.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 4.0 |
| Coherence and Cohesion | 5.0 |
| Lexical Resource | 4.5 |
| Grammatical Range and Accuracy | 4.5 |
| Overall | 4.5 |
Task Achievement / Task Response — Band 4.0
The response fails to meet the minimum word count requirement of 150 words, which significantly impacts the ability to fully develop the description of the process. While the main stages are identified, the explanation is overly simplistic and lacks the necessary detail to provide a comprehensive summary. The overview is present but lacks depth, and the description of the process is fragmented. Because the response is 40 words under the minimum, it cannot be considered a fully developed report of the diagram's features.
Coherence and Cohesion — Band 5.0
The essay is organized into short paragraphs, which helps with the overall structure. However, the use of cohesive devices is mechanical and sometimes inaccurate, such as 'Initialy', 'Subsiquently', and 'Afterwords'. The logical flow is hindered by the brevity of the sentences and the lack of complex linking between the stages of the process. While the sequence of events is generally clear, the transitions between sentences feel repetitive and lack the sophistication required for higher bands.
Lexical Resource — Band 4.5
The vocabulary is quite limited and repetitive, relying on basic terms like 'making', 'collecting', and 'useing'. There are frequent spelling errors throughout the text, such as 'useing', 'cliearly', 'produceing', 'elecricity', 'Subsiquently', 'Afterwords', 'suplly', 'Finaly', 'roteted', and 'electrycity'. These errors are frequent and occasionally impede the reader's understanding. The range of vocabulary is insufficient to describe a technical process with precision, as the student relies on very simple verbs and nouns.
Grammatical Range and Accuracy — Band 4.5
The grammatical range is very limited, consisting mostly of simple sentence structures with frequent errors in verb tense, article usage, and word formation. Examples include 'water hitted by hot rocks', 'steam using condenser', and 'turbine roteted with steam'. The passive voice is attempted but often constructed incorrectly, such as 'electrycity generate by generator'. These frequent errors in basic grammar and sentence construction make the text difficult to follow and demonstrate a lack of control over complex structures.
See this exact question answered at other band scores — the same prompt compared across bands.
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