Band 8.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 8.0 · Cambridge IELTS 21 · 2026-09-28

IELTS Writing Task 1 question

The diagram below shows how one type of desert, known as a rain-shadow desert, is formed.

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

The formation of rain-shadow deserts

Student answer (Band 8.0)

The diagram illustrates the natural process by which a rain-shadow desert is formed due to mountain topography.

Overall, the process consists of a two-stage atmospheric sequence where moisture-laden air drops rain on the ocean-facing side of a mountain range, leaving dry air to pass over the peak and create an inland desert spanning thousands of kilometers.

Initially, prevailing winds move across the sea toward the coastline. Upon reaching land, these winds are forced upward by the rising mountain terrain. As this moist air ascends, it cools, leading to the formation of clouds and subsequent rainfall on the windward slope of the mountains. Consequently, the air mass loses its moisture content during this ascent.

Having crossed the mountain crest, the now dry air continues over the top and descends down the leeward slope. These dry wind currents proceed across inland areas over vast distances of thousands of kilometers. Lacking moisture to produce rain, this dry air flow results in the formation of a rain-shadow desert in the inland region.

AI examiner evaluation

Task Achievement / Task Response: Band 7.5

The student covers all parts of the task well, providing a clear overview and effectively summarizing the main stages of the rain-shadow desert formation process. The key features—such as the wind approaching the coast, the moist air rising and forming clouds on the windward side, and the resulting dry air creating a desert on the leeward side—are accurately reported. The overview successfully captures the core mechanism of the process, and the details are well-grounded in the provided visual data. No information is invented or misread, demonstrating a fully developed response that satisfies the Band 8 descriptors.

Coherence and Cohesion: Band 8.0

Ideas are logically sequenced from the initial atmospheric approach to the final inland desert formation. The response uses paragraphing effectively, with each stage of the process appropriately grouped into distinct paragraphs. Cohesive devices such as 'Initially', 'Upon reaching land', 'As this moist air ascends', and 'Having crossed the mountain crest' are managed skillfully, guiding the reader smoothly through the chronological sequence without feeling mechanical. Referencing and progression are clear throughout.

Lexical Resource: Band 7.5

The student demonstrates a wide and flexible vocabulary range suitable for an academic report. Less common items such as 'moisture-laden air', 'topography', 'windward slope', and 'leeward slope' are used with a high degree of precision and natural collocation. Word choices are accurate and appropriate for describing a scientific/geographical process. There are no noticeable lexical errors or inappropriate collocations.

Grammatical Range and Accuracy: Band 8.0

A wide variety of complex sentence structures is used with a high level of accuracy. The majority of sentences are error-free, featuring sophisticated participial phrases ('Having crossed the mountain crest, the now dry air continues...') and subordinate clauses ('As this moist air ascends, it cools...'). Grammatical control is consistently strong, punctuation is accurate, and any minor slips are entirely absent, reflecting top-tier control.

See this exact question answered at other band scores. The same prompt compared across bands.

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