Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-13

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 illustrates the way how biofuel can be produced.

Overall, it can be seen that cellulose and sugars are the important products of pre-processing and processing stages. Ethanol after microbial additiongoes in different vehicles and releases carbon-dioxide from them.

The process begins with the sunlight and carbon dioxide which are the sources of energy and this energy helps the plants and trees to grow. When they reach their level, farmer harvests them and other crops with the help of tractor. The by products then goes at industrial level where pre-processing of materials are done and cellulose is extracted from them.

Then cellulose goes to processing stage in a lab where suagrs are made. Microbes are added in the sugars to form ethanol which is also called biofuel. From the ethanol, carbon dioxide is released from various vehicles (cars, containers, airplanes) and goes to environment to restart the the process.

AI examiner evaluation

Task Achievement / Task Response: Band 6.5

You cover the main stages from plant growth through harvesting, pre-processing, cellulose, sugars and microbial conversion to ethanol, and you identify the cycle’s return of carbon dioxide. The overview also recognises that ethanol is used by vehicles. These features make the response relevant and broadly complete. However, some details are unclear or inaccurate: “other crops” and “by products” are not specified in the diagram, and “containers” should be trucks. The account also says carbon dioxide is released “from” vehicles without clearly explaining that it is produced when ethanol is used as fuel and then returns to support plant growth. To strengthen the response further, describe this circular relationship precisely and avoid adding unsupported details.

Coherence and Cohesion: Band 6.0

The response has a clear overall sequence, moving from the overview to plant growth, processing and the final fuel-use stage. Paragraphing helps separate the overview from the detailed account, and transitions such as “Then” make the order easy to follow. However, progression is occasionally weakened by unclear references: “they” and “them” in the harvesting paragraph do not always make clear whether they refer to plants, crops or materials. The final sentence also compresses vehicle use, carbon-dioxide release and the cycle’s return into one statement. Use more precise referencing and divide complex stages into clearly connected sentences. A wider range of linking expressions would also make the flow less dependent on simple sequencing words.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “harvest,” “pre-processing,” “cellulose,” “microbes” and “ethanol,” which allows you to describe the main stages. There is also some attempt at more formal phrasing, such as “the sources of energy.” However, several word choices and collocations are inaccurate or imprecise: “the way how” is redundant, “at industrial level” is awkward, and “containers” does not accurately name the transport shown. Spelling slips such as “suagrs” and “additiongoes” also reduce control. Aim for precise process language and check spelling carefully; for example, describe materials as being processed in a facility and name the vehicles as cars, trucks and aircraft.

Grammatical Range and Accuracy: Band 5.5

You attempt both simple and complex forms, including a relative clause in “which are the sources of energy” and a sequence of clauses describing the production stages. The main meaning is generally understandable, but some grammatical errors remain. For example, “the way how biofuel can be produced” has an unnecessary construction, while “farmer harvests them” needs an article or plural subject. Agreement is also inconsistent in “The by products then goes” and “materials are done.” The phrase “the restart the process” contains a repeated article, and “additiongoes” appears to join words and disrupt the sentence. Work on subject–verb agreement, articles and sentence boundaries, while retaining your attempts at longer structures.

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.