Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · Cambridge IELTS 12 · 2026-10-31

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 6.5)

The diagram represnts the process of conversion of heat energy, obtained from earth, into electrical energy.

Overall, five steps are involved in whole scenrio: two underground and three at the ground surface. When water from the natural resources is pushed under the earth, it gets heated, then that is forced to move outside to produce electricity.

First of all, water is transported to hot rocks bed, which is 4.5 km below the surface level, through an injection well. This area is hot enough to raise the temprature of water to a significant level. Then, it is sucked up with the help of production well, which is connected to condenser. This compartment converts the water into steam, After that, the vapors are made to enter into another section where turbine and generator are installed, Having reached here, the steam runs the turbine when it hits its blades. As the turbine and generator have a connection, the generator starts. Consequently, mechanical energy got by moving turbine is changed into electrical energy. The energy, produced in generation zone, is then supplied to electrical towers through cables which conduct electricity.

AI examiner evaluation

Task Achievement / Task Response: Band 7.0

The response gives a clear account of the main process, including the 4.5 km depth, the injection and production wells, heating by hot rocks, and the turbine-generator stage. The opening overview identifies the underground and surface stages and explains the overall conversion from heat to electricity, so the key purpose is clear. Most details follow the diagram, although the description of the condenser as converting water into steam is more specific than the visual establishes: it shows the production well entering the condenser and steam then moving to the turbine. The final reference to electricity being supplied to towers is broadly consistent with the transmission pylon. To strengthen the account further, describe the stages more precisely and avoid adding unsupported explanations such as the water being “sucked up.”

Coherence and Cohesion: Band 7.0

The information is arranged in a clear sequence, moving from an overview to the underground water route and then to electricity generation and transmission. Sequencing expressions such as “First of all,” “Then,” “After that,” and “Consequently” help the reader follow the process. The overview also provides a useful framework by distinguishing underground and surface activity. Some links are less smooth because several stages are packed into long sentences, particularly the sentence beginning “Having reached here,” which combines steam, the turbine, and the generator. Paragraphing is limited, and the transition from the condenser to the turbine-generator section could be made more explicit. Grouping the stages into clearer paragraphs and using more precise references would make the progression even easier to follow.

Lexical Resource: Band 6.0

The response uses a reasonably varied range of process vocabulary, including “injection well,” “production well,” “condenser,” “turbine,” and “mechanical energy.” These terms help convey the technical sequence, and phrases such as “converted into electrical energy” show an attempt at formal reporting. However, some choices are inaccurate or unnatural: “water is transported to hot rocks bed,” “sucked up,” and “electrical towers” do not describe the diagram as precisely as they could. There are also spelling errors, including “represnts,” “scenrio,” and “temprature.” Aim for accurate collocations and consistent technical wording; for example, use “pumped” for the water’s movement and “transmission pylon” for the structure shown.

Grammatical Range and Accuracy: Band 6.0

There is a mix of simple and complex sentence forms, including a conditional-style time clause (“When water … is pushed under the earth”) and a relative clause (“which is connected to condenser”). The sequence is generally understandable, and the writer attempts to vary sentence openings. Some grammatical and punctuation errors remain. Articles are missing in “through an injection well” is correct, but “connected to condenser” should be “connected to the condenser”; “hot rocks bed” also needs a clearer grammatical construction. The sentence beginning “Having reached here” has an unclear subject, and the capitalisation after commas in “steam, After that” and “installed, Having” is incorrect. Review articles, clause subjects, and sentence boundaries to improve control.

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