The diagram below shows how geothermal energy is used to produce electricity.
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Sample Response
The diagramflow chart illustrates the process of generating electricity using geothermal energy in a power plant.geothermal energy underground. There are five main stagessix stages in total, commencing with pumping down cold water into the injection well, and culminating in producing electricity which is transmitted to the gridto grid. These distinct processesprocess can be broadly dividedre-categorized into three major steps, namely the transferring and heating of cold waterliquid, the conversion of water in the condenserin condenser and electricity generation. Initially, cold water is pumped down into the injection well to a depth of 4.5 kilometers before being heatedheating by absorbing energy from hot rocks when water passes through the geothermal zonepasses the geothermal zone. Subsequently, heated water is extracted from the production well and transferred into the condenser where hot water is converted into steam. Turning to electricity generation,Turning to the electricity generation, the turbine is powered by steam to drive itsteam to rotate, producing kinetic energy which plays an directindispensable role in the operation of the generator. Eventually, electricity produced by the generator is transmitted to the grid, completing the entire processprocedure.
Why this response received Band 7.0
The report effectively describes all key stages of the geothermal power generation process in a logical and organized structure. Its primary strength is a well-developed overview and clear sequence of operations, while the main limitation lies in minor grammatical inaccuracies. Focusing on proofreading for article usage and correct participle forms will help elevate the response further.
IELTS Writing Criteria Scores
Task Achievement
The response accurately outlines the key stages of the geothermal process from cold water injection to electricity transmission.
Ensure all details from the diagram, such as stage labels and exact descriptions, strictly align with the visual prompt without over-interpreting terms.
Coherence and Cohesion
The overview and paragraph structure flow logically using appropriate transitional phrases to guide the reader through the sequence.
Vary cohesive devices slightly to avoid overusing simple temporal linkers like 'initially' and 'subsequently'.
Lexical Resource
A good range of topic-specific vocabulary and flexible rephrasing is used to describe the process steps effectively.
Refine precise word choices to ensure natural collocation, such as avoiding slightly formal expressions like 'indispensable role' in technical process descriptions.
Grammatical Range and Accuracy
A mix of complex and passive grammatical structures is demonstrated, though a few minor agreement and verb form errors are present.
Check subject-verb agreement and non-finite verb forms after prepositions, such as using 'being heated' instead of 'being heating'.