Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 12 · 2026-10-26

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 6.0)

The given diagram illustrates information about manufacturing of electricity using geothermal energy, it shows the complete process that happen at a geothermal plant to produce electricity, in this process thermal energy is given as the main source for production of power supply.

This work contains several steps, first of all cold water is pump down from the storage tank to the injection well which is about 4.5 km under the storage tank, then this water is pass through the geothermal zone which contains hot rocks, after crossing this area the water becomes hot and reach the production well, the hot water is then pump up into the condenser chamber where it becomes steam, in the next step the steam is brought towards the turbine, steam is the main component on which the turbine works, the turbine is linked to the generator therefore when the turbine rotates the generator starts producing electricity.

That is the complete note on how the geothermal power plant works and produce power supply using geothermal energy.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

The response covers the main stages in the correct order: cold water is sent down the injection well, heated by the hot rocks, brought up through the production well, converted to steam, and used to drive a turbine and generator. The 4.5 km depth is also reported accurately. This gives a relevant account of the process, but the overview is not clearly separated from the stage-by-stage description, and some details are less fully explained. For example, the opening says thermal energy is the main source, but does not summarise the overall transformation from underground heat to electricity. The final sentence repeats the purpose rather than adding a key feature. A concise overview followed by precise stages would make the main features clearer.

Coherence and Cohesion: Band 6.5

The process is presented in a logical sequence, and phrases such as “first of all,” “then,” “after crossing this area,” and “in the next step” help the reader follow the stages. The explanation also maintains a clear focus on how electricity is produced. However, most of the response is placed in one long paragraph, with several stages joined into a single sentence. This makes the progression less easy to scan and gives the linking language a somewhat mechanical feel. The opening and closing sentences also repeat the general purpose. Separate the overview from the detailed sequence, use paragraphing to distinguish them, and vary the transitions so that each stage connects smoothly without overloading sentences.

Lexical Resource: Band 6.0

There is an adequate range of process vocabulary, including “injection well,” “geothermal zone,” “condenser,” “turbine,” and “generator,” which allows the stages to be identified. The writer also attempts more formal phrasing, such as “thermal energy” and “production of power supply.” Some choices are inaccurate or unnatural, however: “manufacturing of electricity” is less suitable than “generation of electricity,” and “power supply” is repeated where “electricity” or “power” would be clearer. “This work contains several steps” is also an awkward way to introduce a process. Aim for precise, natural collocations and avoid repeating broad phrases; for example, describe water as being heated by hot rocks and steam as driving the turbine.

Grammatical Range and Accuracy: Band 5.5

The response attempts both simple and complex structures, including a sequence of clauses linked by “which,” “after,” and “therefore.” The overall meaning remains understandable, but some grammatical errors recur in verb forms and sentence construction. For example, “cold water is pump down” should use a past participle, and “the water is pass” and “the hot water is then pump up” have the same problem. In “the turbine rotates the generator starts producing electricity,” punctuation or a conjunction is needed to separate the clauses. The opening sentence also joins two independent clauses with only a comma. Use passive forms consistently for the process and divide long sentences into clearer units, while checking agreement and punctuation.

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