Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · Cambridge IELTS 19 · 2026-10-07

IELTS Writing Task 1 question

 

The diagram below shows how a biofuel called ethanol is produced.

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

Student answer (Band 6.5)

This diagram illustrates the various srages involved in the production of biofule called ethanol.

Overall, it is a cyclical process consisting of several steps, starting with the growth of plants and trees and absorbing energy from the sun and ending with the production and use of ethanol, which release carbon dioxide back into the atmosphere.

looking into the more depth, the process begins with energy from sunlight and carbon dioxide, which allows plants and trees to grow. Once they are mature, they are harvested by mechines and transportes to a factory for pre-processing. After that. the material is broken down into cellulose in the processing stage.

In the next stage, the cellulose is converted into sugars and microbes are added to produce ethanol. The ethanol is then used as a fuel for various form of transport such as cars, trucks, and airplanes. During the use of ethanol CO2 is emitted into the air. This gas again absorbed by plants to help them grow which complete the cycle.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You cover the main stages and identify the circular nature of the process, including the return of carbon dioxide to support plant growth. The overview also captures the broad start and end points, and the transport examples are accurately reported. However, some stages are not described precisely: you say the harvested material is transported “to a factory for pre-processing,” then suggest it is “broken down into cellulose in the processing stage.” In the diagram, pre-processing leads to cellulose, which is then processed into sugars; microbes are added before ethanol is produced. Clarifying this sequence would make the account more complete and accurate. The cycle is well recognised, but the distinction between the two conversion stages needs sharper reporting.

Coherence and Cohesion: Band 6.5

The response has a clear overall arrangement: an introduction, an overview, and a chronological account of the stages. Sequencing expressions such as “Once they are mature,” “After that,” and “In the next stage” help the reader follow the process, and the final sentence returns to the cycle. This supports a coherent progression. Some links are less smooth or precise, however. “After that.” is incorrectly separated by a full stop, and “This gas again absorbed by plants” lacks a clear grammatical link to the preceding sentence. The paragraph also moves quickly through the conversion stages, making their relationship harder to follow. Use accurate transitions and clearer references to distinguish each stage and strengthen cohesion.

Lexical Resource: Band 6.0

You use an adequate range of process vocabulary, including “harvested,” “pre-processing,” “cellulose,” “microbes,” and “emitted,” which allows you to describe the diagram’s main stages. Terms such as “cyclical process” and “various forms of transport” are also appropriate. However, spelling and word-choice errors reduce precision: “srages,” “biofule,” “mechines,” and “transportes” should be corrected, while “various form” needs a plural noun. “Broken down into cellulose” is also not the clearest description of the diagram’s sequence. Aim for accurate spelling and more precise process collocations, such as describing material as being converted into cellulose, then sugars, before fermentation produces ethanol.

Grammatical Range and Accuracy: Band 6.0

You attempt a mix of simple and complex structures, including the relative clause in “energy from sunlight and carbon dioxide, which allows plants and trees to grow” and the time clause “Once they are mature.” Most of the process remains understandable, but some grammatical errors persist. The overview begins with lowercase “looking,” and “After that.” creates an incorrect sentence break. In “This gas again absorbed by plants,” the verb “is” is missing; “which complete the cycle” also needs subject–verb agreement (“completes”). There are further issues with number and articles in “various form of transport.” Review complete sentence structure, agreement, and punctuation, while continuing to use complex clauses to show relationships between stages.

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