Band 8.5 IELTS Writing Task 2 Model Answer

Overall Band Score: 8.5 · Cambridge IELTS 18 · 2026-08-24

IELTS Writing Task 2 question

The most important aim of science should be to improve people’s lives. To what extent do you agree or disagree with this statement? Give reasons for your answers and include any relevant examples from your own knowledge or experience.

 

Student answer (Band 8.5)

### Band 9 Sample Answer

Science has played a fundamental role in shaping modern society, from transforming healthcare to revolutionising communication and transportation. While some argue that the primary purpose of scientific research should be to improve people's quality of life, others may contend that science should pursue knowledge regardless of its immediate practical benefits. **I strongly agree that improving human lives should be the principal aim of science, although fundamental research should also be encouraged because it can produce valuable discoveries in the long term.**

One compelling reason for prioritising human well-being is that scientific advances can address some of society's most pressing problems. In the field of medicine, for instance, research has resulted in vaccines, effective treatments and sophisticated diagnostic technologies that have significantly increased life expectancy and reduced mortality rates. Similarly, developments in agricultural science have enabled farmers to produce greater quantities of food using fewer resources, helping to address food insecurity in many parts of the world. These examples demonstrate that science is most valuable when its discoveries can be translated into tangible improvements in people's lives.

Another important benefit of human-centred scientific research is its ability to improve living standards beyond healthcare and food production. Advances in information technology have made communication faster and more accessible, while innovations in renewable energy can help societies reduce their dependence on fossil fuels and mitigate environmental damage. For example, the development of solar and wind technologies has created cleaner alternatives to conventional energy sources. Such innovations not only make everyday life more convenient but can also contribute to a safer and more sustainable future.

However, it would be misguided to suggest that every scientific endeavour must have an immediate practical application. **Basic research**, which is primarily concerned with expanding human knowledge, often produces discoveries whose practical value becomes apparent only decades later. Research into the fundamental properties of matter, for example, has contributed indirectly to technologies that are now indispensable in modern life. Therefore, although improving people's lives should be the overarching objective of science, researchers should retain sufficient freedom to investigate questions whose benefits are not immediately apparent.

**In conclusion, I strongly agree that improving human well-being should be the central purpose of scientific advancement. Nevertheless, this goal should not prevent scientists from conducting fundamental research, since seemingly theoretical discoveries can eventually generate transformative technologies and solutions. The ideal approach is therefore to support both practical research and the pursuit of knowledge, while ensuring that scientific progress ultimately contributes to a better and more sustainable world.**

AI examiner evaluation

Task Achievement / Task Response — Band 8.5

The response fully addresses all parts of the prompt. The writer takes a clear, consistent position that is maintained throughout the essay. The argument is well-developed, balancing the primary focus on human well-being with a nuanced acknowledgment of the role of fundamental research. Each paragraph provides relevant, well-supported examples, such as medical advancements and renewable energy, which effectively illustrate the points made. The conclusion synthesises the arguments logically, demonstrating a sophisticated understanding of the topic.

Coherence and Cohesion — Band 8.5

The essay is exceptionally well-organised. Each paragraph has a clear central topic, and the progression of ideas is logical and smooth. Cohesive devices are used naturally and unobtrusively, such as 'Similarly', 'Another important benefit', and 'Therefore', which guide the reader through the argument without feeling mechanical. Paragraphing is used effectively to separate the main arguments from the counter-argument, ensuring the structure supports the overall flow of the essay.

Lexical Resource — Band 8.5

The vocabulary is wide-ranging, precise, and used with high levels of sophistication. The writer employs academic collocations and topic-specific terminology such as 'fundamental research', 'tangible improvements', 'mitigate environmental damage', and 'transformative technologies'. The control over word choice is natural, and there are no errors in spelling or collocation. The language used is consistently appropriate for an academic context, demonstrating a high degree of lexical flexibility.

Grammatical Range and Accuracy — Band 8.5

The response demonstrates a wide range of grammatical structures used with full flexibility and accuracy. The writer successfully employs complex sentence forms, including conditional structures, relative clauses, and varied subordinating conjunctions (e.g., 'While some argue...', '...since seemingly theoretical discoveries can...'). Punctuation is used correctly to manage complex ideas, and there are no grammatical errors throughout the text. The accuracy is consistent, reflecting a high level of proficiency.

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