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The diagram below shows how a biofuel called ethanol is produced. Summarise the information by selecting and reporting the main features and make comparision where relevant. Write at least 150 words.

The diagram below shows how a biofuel called ethanol is produced.

Summarise the information by selecting and reporting the main features and make comparision where relevant.

Write at least 150 words.

The diagram illustrates the cyclical process of producing ethanol, a type of biofuel, from plants and trees. Initially, plants absorb energy from sunlight and carbon dioxide, enabling growth. Once fully grown, these plants are harvested and undergo pre-processing, during which cellulose, a vital raw material, is extracted.

Following this, the cellulose is broken down into sugars, which are then fermented. Microbes are added in this stage to facilitate the conversion of sugars into ethanol. The ethanol produced is then ready for use, particularly in transportation industries, where it powers vehicles like cars and airplanes. Throughout the process, carbon dioxide is released both during ethanol production and its subsequent use in engines.

An important feature of this cycle is its renewable nature—carbon dioxide emitted during fuel combustion is reabsorbed by plants for photosynthesis, thus contributing to a more sustainable process. In conclusion, the ethanol production process follows a series of steps, from harvesting plants to microbial fermentation, while maintaining a closed-loop carbon cycle.


Gợi ý nâng cấp từ vựng

  1. "the cyclical process of producing ethanol" -> "the cyclical process of ethanol production"
    Explanation: "Ethanol production" is a more concise and formal phrase that directly conveys the subject matter without unnecessary wording.

  2. "enabling growth" -> "facilitating growth"
    Explanation: "Facilitating" is a more precise term in an academic context, suggesting active support in the growth process rather than a more casual "enabling."

  3. "harvested and undergo pre-processing" -> "harvested and subjected to pre-processing"
    Explanation: "Subjected to" conveys a more formal tone and indicates that the plants are processed as part of a systematic procedure, enhancing clarity.

  4. "a vital raw material" -> "an essential raw material"
    Explanation: "Essential" is a stronger term in academic writing, emphasizing the necessity of cellulose in the process more effectively than "vital."

  5. "Microbes are added in this stage" -> "Microbes are introduced at this stage"
    Explanation: "Introduced" is a more formal term that aligns better with academic language, indicating a deliberate action rather than a casual addition.

  6. "ready for use, particularly in transportation industries" -> "ready for application, particularly in the transportation sector"
    Explanation: "Application" is a more formal term than "use," and "sector" is more precise than "industries," enhancing the academic tone.

  7. "where it powers vehicles like cars and airplanes" -> "where it powers various vehicles, including automobiles and aircraft"
    Explanation: "Various vehicles, including" is more formal and precise than "vehicles like," and "automobiles" and "aircraft" are more specific than "cars and airplanes."

  8. "An important feature of this cycle is its renewable nature" -> "A significant characteristic of this cycle is its renewable nature"
    Explanation: "Significant characteristic" is a more formal and precise phrase than "important feature," enhancing the academic tone.

  9. "thus contributing to a more sustainable process" -> "thereby contributing to a more sustainable system"
    Explanation: "Thereby" is a more formal transition than "thus," and "system" is a more precise term than "process," which can imply a broader range of activities.

  10. "the ethanol production process follows a series of steps" -> "the ethanol production process encompasses a series of steps"
    Explanation: "Encompasses" suggests a more comprehensive view of the process, enhancing the academic tone and precision.

Band điểm Task Achivement ước lượng: 7

Band Score: 7

Explanation: The essay provides a clear overview of the main stages of ethanol production, including the role of plants, pre-processing, cellulose breakdown, fermentation, and the use of ethanol as a fuel. It also highlights the key feature of the process, which is its renewable nature.

How to improve: The essay could be improved by providing more specific details about the stages of ethanol production. For example, the essay could mention the specific types of plants used, the methods of pre-processing, and the types of microbes used in fermentation. The essay could also provide more specific information about the use of ethanol as a fuel, such as the types of vehicles that use ethanol and the environmental benefits of using ethanol as a fuel.

Band điểm Coherence & Cohesion ước lượng: 7

Band Score: 7.0

Explanation: The essay logically organizes information and ideas, demonstrating clear progression throughout the description of the ethanol production process. Each stage of the process is presented in a coherent manner, and there is a clear central topic within each paragraph. The use of cohesive devices is appropriate, although there are instances where the connections between ideas could be more fluid. For example, the transition between the fermentation stage and the discussion of the renewable nature of the process could be smoother. Overall, the essay meets the criteria for Band 7 by effectively presenting the information while maintaining a logical structure.

How to improve: To achieve a higher band score, the writer could enhance the use of cohesive devices to create more seamless transitions between ideas. Additionally, ensuring that each paragraph has a distinct focus while linking them more clearly to the overall topic would improve coherence. Incorporating varied sentence structures and more sophisticated vocabulary could also contribute to a stronger impression of cohesion.

Band điểm Lexical Resource ước lượng: 7

Band Score: 7.0

Explanation:
The essay demonstrates a sufficient range of vocabulary that allows for flexibility and precision in conveying the process of ethanol production. It employs less common lexical items, such as "cellulose," "fermented," and "microbes," showing some awareness of style and collocation. However, there are occasional errors in word choice, such as the phrase "the cyclical process of producing ethanol," which could be more precisely articulated. Additionally, while the vocabulary is adequate, it does not exhibit the sophistication or natural flow characteristic of higher band scores.

How to improve:
To achieve a higher band score, the essay could benefit from incorporating a wider variety of advanced vocabulary and more complex sentence structures. Additionally, ensuring precise word choice and avoiding repetitive phrases would enhance the overall lexical resource. Focusing on collocations and refining the use of less common vocabulary would also contribute to a more sophisticated expression of ideas.

Band điểm Grammatical Range & Accuracy ước lượng: 7

Band Score: 7.0

Explanation: The essay demonstrates a variety of complex structures and produces frequent error-free sentences, which aligns well with the criteria for Band 7. The grammatical control is generally good, with only a few minor errors present. For instance, the phrase "enabling growth" is correctly used, and the overall sentence structure is varied. However, there are some areas where the complexity could be enhanced, and a few minor inaccuracies in punctuation could be observed, which prevent it from reaching a higher band score.

How to improve: To achieve a higher band score, the writer could incorporate a wider range of complex structures and ensure that all sentences are error-free. Additionally, increasing the variety of sentence openings and using more sophisticated vocabulary would enhance the overall grammatical range. Paying closer attention to punctuation and ensuring that all grammatical forms are used accurately would also contribute to a stronger performance in this criterion.

Bài sửa mẫu

The diagram illustrates the cyclical process of producing ethanol, a type of biofuel, from plants and trees. Initially, plants absorb energy from sunlight and carbon dioxide, which enables their growth. Once fully grown, these plants are harvested and undergo pre-processing, during which cellulose—a vital raw material—is extracted.

Following this, the cellulose is broken down into sugars, which are then fermented. Microbes are introduced at this stage to facilitate the conversion of sugars into ethanol. The resulting ethanol is then ready for use, particularly in the transportation industry, where it powers vehicles such as cars and airplanes. Throughout the process, carbon dioxide is released both during ethanol production and its subsequent use in engines.

An important feature of this cycle is its renewable nature; carbon dioxide emitted during fuel combustion is reabsorbed by plants for photosynthesis, thus contributing to a more sustainable process. The ethanol production process follows a series of steps, from harvesting plants to microbial fermentation, while maintaining a closed-loop carbon cycle.

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