Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · Cambridge IELTS 12 · 2026-09-23
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 provided illustration details shows techinical terms is to used genreate electricity. power generate in this geothermal power plan make so much different.The main different as we show cold water pump and hot water pump and their is huge changes is down and up.
Overall, Geothermal power plant the first stage of cold water and the end of they used main tool generator and turbine both are very important in power generate. The cold water measurement is 4.5km. condenser is the huge part of create power because their were make a steam process. Main support of the power generator is the injection well.
The injection well and the production well is important piller of the power produce but the mian process is the combination of generator and turbine because the whole process and result only depend on generator. i show the diffrences between cold water pump and hot water pump slighlty up and down beacue it's needed to up and down flow of the water.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 4.0 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 4.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 4.0 |
Task Achievement / Task Response: Band 4.0
The response attempts to describe the geothermal power plant process diagram, mentioning key components such as the injection well, production well, condenser, turbine, and generator, alongside the 4.5km measurement. However, the task achievement is severely compromised by a lack of logical reporting of the sequence. Instead of a clear, objective summary of the stages from cold water to electricity generation, the writing reads as a fragmented personal commentary filled with vague statements like 'the whole process and result only depend on generator.' Furthermore, the mechanics of the process are poorly explained and heavily garbled. Consequently, the response fails to adequately cover all parts of the task in a coherent or accurate manner, corresponding to a Band 4.0 level.
Coherence and Cohesion: Band 4.0
The text is divided into three short paragraphs, but overall organization and logical progression are largely absent. Ideas are disjointed and bounce erratically between components without a clear narrative or process flow. Cohesive devices are either missing or misused, leading to confusing transitions, as seen in sentences like 'Overall, Geothermal power plant the first stage of cold water and the end of they used main tool generator...'. Reference pronouns are frequently unclear, making it difficult for the reader to follow what 'their' or 'both' refer to. Paragraphing is weak, and the lack of structural progression results in a performance that fits the Band 4.0 descriptor.
Lexical Resource: Band 4.0
The vocabulary used is extremely limited, basic, and repetitive. Throughout the text, key terms from the prompt are misspelled or awkwardly adapted, such as 'techinical', 'genreate', 'plan' instead of plant, and 'piller'. The writer relies heavily on simple words and produces non-standard collocations and phrases that frequently strain the reader's understanding, such as 'make so much different' and 'huge part of create power'. There is no demonstration of an adequate range of vocabulary for an Academic Task 1 response, placing this criterion firmly at Band 4.0.
Grammatical Range and Accuracy: Band 4.0
Grammatical control is extremely weak throughout the response. There is an absence of accurate complex sentence structures, and even simple sentences suffer from fundamental errors in subject-verb agreement, tense usage, and word form (e.g., 'power generate', 'cold water pump and hot water pump and their is huge changes'). Punctuation and sentence boundaries are erratic, with many sentences lacking proper syntactic structure or complete predicates (e.g., 'The cold water measurement is 4.5km. condenser is the huge part...'). Frequent, pervasive errors distort the meaning and cause severe difficulty for the reader, matching the descriptors for Band 4.0.
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