Band 5.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 5.5 · Cambridge IELTS 19 · 2026-11-09

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 5.5)

The process diagram illustrate the procedure of biofuel called ethanol production.

Overall, there are nine steps of a complete cycle of production of ethanol which starting phase begine with plant and trees grow then pre processing and processing of ethanol. At the end the cycle shows how ethanol convert into carbon dioxide.

First of all plant used carbon dioxide and light for their growth than the harvesting stage occour that is the cultivation stage of plants and then it put in a pre processing machine to extract cellulose from it than the processing satge starts in laboratories to convert into ethanol.

In the six stage microbes are added into the sugars molecules of cellulose to convert it into ethanol and then it is used in different types of transports specialy in vechiels and plans as a biofuel as energy source. In the last stage these vechiels convert ethanol into carbon dioxide as a byproduct which is again ready for the use of plants and trees.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You identify the diagram as a production cycle and give a relevant overview, noting plant growth at the beginning and carbon dioxide returning to plants at the end. You also cover the main sequence from harvesting through pre-processing and processing to ethanol, and mention its use as fuel for transport. However, some stages are unclear or inaccurately described: the diagram shows cellulose being processed into sugars, with microbes added before ethanol is produced, whereas your account says microbes are added to “sugars molecules of cellulose” and refers to processing in laboratories. The overview also says there are nine steps, although the diagram presents a broader sequence with transport and carbon-dioxide return. Clarifying these relationships and distinguishing the production stages from the later fuel-use cycle would make the account more complete and precise.

Coherence and Cohesion: Band 5.5

The response has a recognisable structure: an introduction, an overview, and two paragraphs describing the process. Sequencing phrases such as “First of all,” “then,” and “In the last stage” help the reader follow the general direction of the cycle. However, progression is sometimes difficult to track because several stages are compressed into long sentences, especially the account beginning “First of all plant used carbon dioxide.” The phrase “In the six stage” also does not clearly connect to the preceding sequence, and “At the end” is used before the later transport and carbon-dioxide stages are explained. Use shorter stage-by-stage sentences and clearer references to the materials being processed to improve cohesion.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “harvesting,” “cellulose,” “microbes,” “byproduct,” and “biofuel,” which helps communicate the topic. There is also some attempt to vary wording through phrases such as “procedure” and “production.” However, spelling and word-choice errors are noticeable, including “begine,” “occour,” “satge,” “specialy,” and “vechiels,” and some expressions are imprecise or unnatural, such as “the cultivation stage of plants” for harvesting and “used in different types of transports.” These issues sometimes make the process harder to understand. Check spelling carefully and choose terms that describe the diagram’s stages and outputs precisely.

Grammatical Range and Accuracy: Band 5.0

You attempt both simple and more extended sentence forms, including a relative clause in “a complete cycle of production of ethanol which…” and a sequence joined with “then.” This shows some range, but control is uneven. Errors include subject–verb agreement in “The process diagram illustrate” and “these vechiels convert,” missing or incorrect articles in “used carbon dioxide and light,” and faulty verb forms in “how ethanol convert into carbon dioxide.” Several clauses are joined with “than/then” without clear sentence boundaries, making relationships difficult to follow. Aim for accurate simple sentences first, then add subordinate clauses selectively; check agreement, articles, and tense in each sentence.

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