Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-14

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 6.0)

The process diagram illustrates the production of a biofuel known as ethanol.

Overall, it is a ten-stage, combination of natural and man-made, ciruclar process. It begins with mature plants and trees, sugar and Mircobes being added as raw materials, and finally releasing carbon dioxide in the air.

First of all, energy in the form of sunlight and carbon dioxide helps plants and tres to grow. After that, tractors are to used to harvest the grown trees and plants, which leads to pre-processing of trees. Cellulose is extracted from the tiny particles that made during pre-processing. Then the cellulose is processed in factories to form formulas.

After processing, a chemical formula is produced named as sugars. In that sugars, Microbes are added which form Ethanol. That Ethanol is used three means of transport: cars,trucks and airplanes. These transports use Ethanol and release Carbon dioxide in the air and this cycle repeats.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

The response covers the main stages and gives a clear overall account of the cycle, including plant growth, processing, the addition of microbes, ethanol use in transport, and carbon dioxide returning to the plants. This is a relevant overview, although “ten-stage” is not clearly supported by the diagram’s sequence, and the overview’s reference to sugar and microbes as raw materials is inaccurate: sugars are produced during processing, and microbes are added afterward. Some details are also unclear or imprecise, such as saying cellulose is extracted from “tiny particles” and that processing forms “formulas.” To strengthen the report, describe the conversion from cellulose to sugars accurately and explain the carbon-dioxide loop more precisely. The main stages are present, but some are less fully and accurately reported than others.

Coherence and Cohesion: Band 6.5

The response is arranged in a sensible sequence: an introduction and overview are followed by the early production stages and then the conversion to ethanol and its use. Sequencing phrases such as “First of all,” “After that,” and “Then” help the reader follow the process. However, the linking is somewhat mechanical, and the overview’s list of “plants and trees, sugar and Mircobes” interrupts the process logic by presenting later stages as initial materials. Some references are also unclear, particularly “In that sugars,” and the final sentence combines transport use and the cycle’s return in a compressed way. Grouping the stages into clearer paragraphs and using more precise links between each input and output would make progression smoother and cohesion less dependent on repeated sequencing words.

Lexical Resource: Band 5.5

The response uses relevant process vocabulary, including “harvest,” “pre-processing,” “cellulose,” “microbes,” and “release carbon dioxide,” so the reader can identify the main stages. However, the range and precision are limited, and several choices are inaccurate or unnatural: “form formulas” does not describe the production of sugars, “chemical formula” is not an appropriate label for sugars, and “three means of transport” is awkward. Spelling errors such as “ciruclar,” “Mircobes,” and “tres” also reduce control. Aim for accurate process collocations and avoid substituting vague terms for the diagram’s labels. For example, describe processing as converting cellulose into sugars, rather than saying it produces a formula.

Grammatical Range and Accuracy: Band 5.5

There is some variety in sentence structure, including a relative clause in “the tiny particles that made during pre-processing” and a sequence of linked process clauses. Most of the intended meaning remains understandable, but errors recur in verb forms, articles, and sentence construction. Examples include “tractors are to used,” “Cellulose is extracted from the tiny particles that made,” “In that sugars,” and “That Ethanol is used three means of transport.” The overview also has an awkwardly constructed list after “begins with.” These errors make several sentences difficult to read, even though the overall process can be followed. Practise forming passive structures consistently and check that each clause has a complete, correctly formed verb phrase.

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