Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-09

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 diagram depicts the process of ethanol formation.

Overall, the process of biofuel production is a recycling process. The primary source of biofuel is considered as carbon dioxide, plants and trees.

First of all, the plants and trees that are grown from the sunlight and carbon dioxide are harvested by the farmer. The harvested plants undergoes pre-processing to generate cellulose. The sugars are extracted from the cellulose by processing in laboratory. The conical flask and test tubes are deployed to make the process efficient.Additionally, the microbes are added to the sugar to form an ethanol.

Moreover, this ethanol is used as a biofuel for many modes of commute: Aeroplanes, trucks and cars. As a result of biofuel usage, the transport emits the carbon dioxide, one of the greenhouse gases, get reacted with sunlight to form an energy for the plant and trees. This energy facilitates the plants to grow healthy.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You identify the diagram as a cyclical process and cover its main stages, from plant growth and harvesting through cellulose, sugars, microbes and ethanol, then transport use and carbon dioxide returning to support plant growth. This gives a relevant account of the overall process. However, some details are unclear or not supported by the diagram: it shows sunlight and carbon dioxide as inputs to plant growth, not plants being grown “from the sunlight,” and it does not show a farmer, laboratory, conical flask or test tubes. The explanation of how carbon dioxide returns to the plants is also imprecise. To strengthen the response, describe only visible stages and explain the cycle accurately, while avoiding unsupported equipment details.

Coherence and Cohesion: Band 6.0

The response has a clear overall arrangement: an introduction and overview are followed by the production stages and then the fuel’s use and carbon cycle. Sequencing phrases such as “First of all,” “Additionally” and “Moreover” help the reader follow the process. However, some links are mechanical, and the transition from the production stages to the transport cycle could be smoother. The sentence about the flask and test tubes interrupts the sequence and introduces information that is not in the diagram. There is also some repetition of “plants and trees” and “carbon dioxide.” Grouping the stages into clearer phases and using precise references such as “this fuel” or “the resulting emissions” would improve flow.

Lexical Resource: Band 6.0

You use a suitable range of process vocabulary, including “pre-processing,” “cellulose,” “microbes” and “biofuel,” and the reader can generally understand the stages. There are also attempts at more formal phrasing, such as “primary source” and “facilitates.” However, some choices are unnatural or imprecise for this diagram: “formation” is less suitable than “production,” “modes of commute” is awkward, and “get reacted” is not an appropriate expression for the carbon cycle. “The primary source of biofuel is considered as carbon dioxide, plants and trees” is also unclear in meaning. Prefer accurate process collocations, such as “ethanol is produced,” “modes of transport,” and “carbon dioxide is absorbed by growing plants.”

Grammatical Range and Accuracy: Band 5.5

You attempt both simple and more complex sentence forms, including a relative clause in “plants and trees that are grown…” and a result clause beginning “As a result of biofuel usage.” Most of the sequence remains understandable, but some grammatical errors reduce accuracy. For example, “The harvested plants undergoes” has a subject–verb agreement error; “to form an ethanol” uses an unnecessary article; and “the transport emits the carbon dioxide … get reacted” has an unclear, faulty clause structure. The missing space after “efficient.” is also a punctuation issue. Check agreement and articles, and make sure each sentence has a clear subject and verb, especially when explaining cause and effect.

See this exact question answered at other band scores. The same prompt compared across bands.

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.