Band 5.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 5.0 · Cambridge IELTS 12 · 2026-10-29
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 5.0)
The diagram illustrate the geothermal energy is used to produce electricity.
Overall, this process start from cold water, its turbines are 4.5 km, while this diagram is ended in generator turbine.
the cold water is the main and important part of geothermal energy to generate the electricity and the cold water pump down is 4.5 km. The next process is the injection well in the geothermal zone (hot rocks) and it is the part of energy. The next step is production well it is complete the circle of the Hot water pumped up the forth part is condenser a device can convert vapor or gas in to liquid by cooling it and the stream and the next generator turbine is (powered by the stream) and the next step is ( powered by turbine and produces electricity) and the generator is on. So I know that there is a process of the geothermal energy is used to generate the electrity.
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 5.0 |
| Coherence and Cohesion | 5.0 |
| Lexical Resource | 5.5 |
| Grammatical Range and Accuracy | 4.5 |
| Overall | 5.0 |
Task Achievement / Task Response: Band 5.0
You identify the process as geothermal electricity production and mention several relevant components, including the injection well, hot rocks, production well, condenser, turbine and generator. However, the account only partially explains how these stages connect, and some key details are inaccurate or unclear: the 4.5 km measurement refers to the depth of the injection well, not to turbines, and the process does not end in a “generator turbine.” The overview also does not clearly summarise the transformation from cold water to steam and then electricity. To strengthen the response, describe the stages in their actual order and distinguish the roles of the turbine and generator.
Coherence and Cohesion: Band 5.0
There is an attempt to organise the response with an opening, an overview and a sequence of stages. Words such as “Overall” and “The next step” signal progression, and the main equipment is generally introduced in process order. However, the overview is difficult to follow, and most of the description is compressed into one long paragraph with repeated “the next” transitions. Connections between stages are sometimes unclear—for example, the movement from the production well to the condenser and steam is not explained cleanly. Use separate paragraphs for the overview and details, then link each stage with precise sequencing language such as “After passing through the hot rocks” and “The resulting steam then drives the turbine.”
Lexical Resource: Band 5.5
You use relevant process vocabulary, including “injection well,” “geothermal zone,” “condenser,” “turbine” and “generator,” which gives the response a basic range suited to the diagram. Some terms are used imprecisely, however: “its turbines are 4.5 km” confuses the well’s depth with the turbine, while “the stream” appears to mean “steam.” Phrases such as “complete the circle” and “the generator is on” are also vague or unnatural for describing a process. Choose exact verbs and collocations for each stage, such as water being pumped down, heated, pumped up, converted into steam, and used to drive a turbine. Check spelling of key technical words.
Grammatical Range and Accuracy: Band 4.5
The response attempts both simple and longer sentence forms, but control is limited, and errors frequently make relationships between stages difficult to understand. For example, “The diagram illustrate” has subject–verb disagreement, and “Overall, this process start” uses the wrong verb form. The sentence beginning “the next step is production well” then combines several stages without clear grammatical boundaries, making the sequence hard to interpret. Articles and sentence punctuation are also inconsistent. Build the description with shorter, complete sentences first, ensuring each has a clear subject and verb; then add subordinate clauses only where you can control them. For example: “Cold water is pumped down an injection well. It passes through hot rocks and returns to the surface through a production well.”
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