Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 12 · 2026-10-20

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 6.0)

The diagram illustrates the process of manufacturing electricity using geothermal energy which is detailed in five steps.

First, cold water stored inside a tank is pumped undergorund approximately 4.5km deep, through an injection well. This rapid force of water encounters hot stones below the ground, also known as geothermal zone, causing the water to become hotter. Next, the heat-induced water is pumped upwards through a production well to a condenser. Inside the condenser, precipitate of steam develops as hot air rises above from the warm water moving upwards from the ground.

Lastly, the steam move towards the turbine, causing it propagate amd generate energy. The energy derived from the turbine results in electricity inside the generator, which is then supplied to transmission towers that transport it to substations or long distances.

Overall, the picture details the workflow of heat generation using rocks underground that produces large quantity of electricity through steam.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You cover the main sequence from pumping cold water underground to generating electricity, and you include the important 4.5 km depth and the roles of the injection and production wells. The overview also identifies underground heat and steam as central to the process. However, some details are unclear or not fully faithful to the diagram: the condenser produces steam, but the explanation that “hot air rises” and that steam “develops” as a “precipitate” is not shown. The final claim about electricity being sent to substations is also unsupported; the diagram shows transmission lines and a pylon. To strengthen the response, describe the condenser and turbine more precisely and keep the overview focused on the complete, diagrammed process.

Coherence and Cohesion: Band 6.5

The response has a clear overall progression, using “First,” “Next,” and “Lastly” to guide the reader through the stages. The paragraphing also separates the process description from the concluding overview. This gives the account a coherent structure. Some links between ideas are less smooth, however: the sentence about the condenser combines steam formation with an explanation about hot air rising, making the sequence harder to follow. The final paragraph repeats the idea of heat generation rather than adding a distinct summary of the process. For stronger cohesion, make each stage a clear step, use references such as “this steam” only when their antecedent is unmistakable, and place the overview before the detailed sequence or make it a concise summary of the whole cycle.

Lexical Resource: Band 6.0

You use a reasonable range of process vocabulary, including “injection well,” “production well,” “condenser,” “turbine,” and “transmission towers,” which helps identify the equipment. There are also attempts at more formal wording, such as “heat-induced” and “derived from.” Some choices are inaccurate or unnatural for this diagram: “manufacturing electricity” is less suitable than describing electricity as being generated, “precipitate of steam” does not express steam formation, and “hot stones” is less precise than the diagram’s “hot rocks.” Spelling slips such as “undergorund” and “amd” also reduce accuracy. Aim for precise process collocations and avoid adding technical-sounding terms when a simpler, accurate phrase is available.

Grammatical Range and Accuracy: Band 6.0

You use a mix of simple and complex structures, including a relative clause in “which is then supplied” and a participial phrase in “causing the water to become hotter.” Most of the sequence remains understandable, but some grammatical errors are present. For example, “the steam move” needs subject–verb agreement (“steam moves”), and “causing it propagate” needs an infinitive marker (“causing it to propagate”) or a clearer verb construction. In “causing it propagate amd generate energy,” the pronoun reference is also unclear. The sentence beginning “Inside the condenser” is structurally awkward because its explanation does not connect cleanly to the main process. Review agreement, infinitive patterns, and sentence boundaries while retaining your varied sentence forms.

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