Band 5.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 5.5 · 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 5.5)

The above diagram shows how biofuel by the name ethanol is producing naturally. It involves several stages during biofuel production.

First of all, plants plays a vital role by taking energy in the from of sunlight and carbondioxide from the enviornment and absorbs it. Then harvesting, takes place and move through pre-processing and convert it into cellulose. Cellulose then move through different processings in the laboratory and make sure to convert it into sugary compounds. Then microbes were attacked on it and converted it into ethanol, which is a form of biofuel used in vehicals. After manufacturing, it is used in the form of biofuel in transporations like aeroplanes, cars, trucks. These vehicals again produce carbondioxide emission when used and its smoke along with carbondioxide re-enter into the enviornement and again it is absorb by trees and cycle repeats itself in the enviornement.

Overall, this recycling natural process provides a pure biofuel in the form of ethanol which is used as biofuel to run transport system.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You cover the main stages, from plants absorbing sunlight and carbon dioxide through harvesting, pre-processing, cellulose, processing, sugars, microbes and ethanol, and you also mention its use in transport and the return of carbon dioxide. This gives a relevant account of the cycle. However, some details are unclear or not fully grounded in the diagram: “in the laboratory” is not specified, and “pure biofuel” is an unsupported description. The overview identifies the process as a cycle, but could more clearly summarise its key feature: carbon dioxide released by vehicles returns to support plant growth. Describe the stages more precisely and avoid adding claims not shown in the visual.

Coherence and Cohesion: Band 6.5

The response has a clear overall sequence, signalled by “First of all,” “Then,” and “Overall,” and the stages are generally presented in the order shown. The final reference to carbon dioxide being absorbed by trees also helps connect the end of the process back to its beginning. This is a coherent arrangement, though the long first paragraph packs many stages and ideas into a single block, making some transitions less clear. For example, “Then harvesting, takes place and move through pre-processing” does not clearly identify what moves through the next stage. Use separate paragraphs for the overview and process details, and make links between stages explicit rather than relying mainly on repeated “then” constructions.

Lexical Resource: Band 5.0

You use relevant process vocabulary, including “harvesting,” “pre-processing,” “cellulose,” “microbes,” and “emission,” so the reader can follow the general subject. However, the range is limited and several word choices or collocations are inaccurate, such as “microbes were attacked on it,” “sugary compounds,” and “used in the form of biofuel in transporations.” Spelling errors such as “carbondioxide,” “enviornment,” and “vehicals” are also noticeable and reduce precision. Aim for standard process descriptions and accurate spelling; for instance, say that microbes are added to the sugars and that ethanol is used as fuel for transport. Avoid repeating “biofuel” when a more precise term is available.

Grammatical Range and Accuracy: Band 5.0

You attempt both simple and longer sentences, and the overall meaning is usually recoverable. However, errors in agreement, verb forms, and sentence construction occur often enough to make some descriptions awkward. Examples include “plants plays,” “it is absorb by trees,” and “Cellulose then move through different processings.” The sentence beginning “Then harvesting, takes place” also has an unnecessary comma and an unclear grammatical subject. Passive forms would suit this process well, but they need consistent control: for example, “the plants are harvested,” followed by “the material is pre-processed.” Check subject–verb agreement and keep verb tense consistent when describing the stages. Breaking long sentences into shorter, complete clauses would also improve accuracy.

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