Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 14 · 2026-10-07

IELTS Writing Task 1 question

The diagram below shows how electricity is generated in a hydroelectric power station.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 4.5)

The chart illustrates that how electricity is generated in a hydroelectric power station.

The water comes from the river in the way of waves and then he enter into high level reservoir in the upper side have a dam gate which intake in day or open or night closed. when the gate of the dam is open when the flow of water water across the dam gate reached the flow of water which can generate electricity in day then we can use the electricity in you dailylife. The flow of water during in night it only work on pumping the water into back of the river.

In day the flow of water pass through the generator the reversibale turbines can operate generator and generator are allso connect power lines national grid in day the the water low level reservoir but in night the flow of water pump water into high level reservoir

AI examiner evaluation

Task Achievement / Task Response: Band 4.0

You identify the process as hydroelectricity generation and include several relevant stages: water moves from the high-level reservoir through the turbines, electricity reaches the national grid, and water is returned at night. However, the account is incomplete and sometimes inaccurate: the river feeds the reservoir, the daytime flow goes through the reversible turbines to drive the generator, and water is pumped from the low-level reservoir back to the high-level reservoir at night—not back to the river. There is no clear overview of the cycle’s two operating modes, and some details, such as using the electricity in daily life, are not shown in the diagram. The response is also 143 words, below the required 150, with nine copied prompt words excluded from the count. Cover the stages more precisely and meet the minimum length.

Coherence and Cohesion: Band 4.5

The response has a basic sequence, moving from the river and reservoir to daytime generation and then nighttime pumping. The references to “In day” and “in night” help signal the two operating modes. However, the information is not arranged into clear paragraphs or a consistently logical progression, and several ideas are crowded into long sentences. For example, the sentence beginning “when the gate of the dam is open” combines the intake, water flow, electricity generation, and everyday use without clear links. Repetition of “flow of water” and repeated “and” also make relationships between stages difficult to follow. Separate the overview from the process details, and use clear sequencing such as “During the day” and “At night” to guide the reader.

Lexical Resource: Band 5.0

You use some relevant process vocabulary, including “reservoir,” “intake,” “generator,” “power lines,” and “national grid,” so the topic is recognisable. However, the range is limited and several word choices or combinations are inaccurate or unclear, such as “in the way of waves,” “enter into high level reservoir,” and “back of the river.” Repetition of “flow of water” and “day” also limits precision. Spelling errors such as “reversibale” and “allso” further reduce control. Aim for concise, accurate process language: describe water as flowing from one reservoir to another, and use verbs such as “drives,” “generates,” and “pumps” to distinguish the stages.

Grammatical Range and Accuracy: Band 4.5

You attempt to connect stages using clauses and time references, but sentence structures are often difficult to control, and errors frequently obscure the process. For instance, “The water comes from the river in the way of waves and then he enter” has an unclear subject reference and incorrect verb agreement. In “the upper side have a dam gate which intake,” the clause structure and article use are faulty. The final sentence also shifts between singular and plural forms: “the flow of water pass” and “generator are.” Punctuation is inconsistent, with run-on sentences and missing sentence boundaries. Practise accurate simple sentences first, then combine them with controlled clauses, keeping subjects and verbs consistent.

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