Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · Cambridge IELTS 19 · 2026-10-12

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 below gives information about the production of ethanol from biofuel.

Overall, the process is being started from harvesting the trees followed by the different stages of pre-processing, cellulose, processing, sugars and addition of microbes to reach the production of ethanol and is used by different vehicles.

Firstly, the trees are harvested by tractor and is carried away to the pre-processing where the trees got its screening and the product produced is called cellulose. These cellulose are further processed and tested in laboratories. Next, after processing the cellulose are converted to sugars which has a specific structure. Moreover, we have a process called addition of microbes where we add microbes to these sugar to form ethanol, thus, ethanol is produced.

Finally, these ethanol are further used in aeroplanes, trucks, and cars which then exhale carbon dioxide to the environment. Lastly, these carbon dioxide are then inhaled by the trees and plants again.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You cover the main stages from harvesting through processing and fermentation, and you include the use of ethanol in transport and the return of carbon dioxide to plants. This gives the reader a broadly accurate account of the cycle. However, the overview says the process starts with harvesting, whereas the diagram begins with sunlight and carbon dioxide enabling plants and trees to grow. Some details are also unsupported: the diagram does not show screening, laboratory testing, or a specific sugar structure. To make the report more complete and precise, describe the initial growth stage and explain the cycle’s key relationship: transport releases carbon dioxide, which is then used by plants as they grow. Avoid adding processes that are not shown.

Coherence and Cohesion: Band 6.0

The response follows the production sequence in a generally logical order and uses paragraph breaks to separate the overview from the stages and final cycle. Sequencing signals such as “Firstly,” “Next,” and “Finally” help the reader follow the account. However, the progression is somewhat mechanical, with “Lastly” repeating the function of “Finally,” and “Moreover” does not clearly signal a new stage. The overview also begins at harvesting, which makes the process sequence less clear because plant growth comes first. Some references, such as “these” in “these cellulose” and “these carbon dioxide,” are not clear or natural. Group the stages into a more purposeful sequence and use precise references to each material or output.

Lexical Resource: Band 5.5

You use relevant process vocabulary, including “pre-processing,” “cellulose,” “processing,” “sugars,” and “ethanol,” so the topic is generally clear. There is also some variety in how stages are described. However, several word choices and collocations are inaccurate or imprecise: “the trees got its screening” does not clearly describe the diagram, “tested in laboratories” adds an unsupported detail, and vehicles do not “exhale” carbon dioxide. Repeated use of “process” and “produced” also limits flexibility. Aim for precise, diagram-based terms such as “converted,” “released,” and “absorbed,” and avoid technical-sounding details unless they are shown. More accurate collocations would make the description clearer and more natural.

Grammatical Range and Accuracy: Band 5.5

You attempt a mixture of simple sentences and longer structures, including a sequence joined with “which” and a result clause beginning “where we add microbes.” The overall meaning is usually understandable, but some errors in agreement, articles, and verb forms reduce accuracy. For example, “the trees are harvested by tractor and is carried away” has a subject–verb agreement problem, while “these cellulose are” and “these carbon dioxide are” use plural forms with uncountable nouns. “The trees got its screening” also has an unsuitable verb form and unclear agreement. Practise keeping subjects and verbs aligned, and use consistent passive forms for process descriptions, such as “the cellulose is processed” and “carbon dioxide is released.”

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