Band 8.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 8.0 · Cambridge IELTS 21 · 2026-09-22

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 step-by-step process by which a rain-shadow desert forms on the leeward side of a mountain range, as moist air from the sea is intercepted and depleted of moisture.

Overall, the formation involves seven sequential stages: moist maritime air is forced upward over mountains, leading to condensation, rainfall on the windward slope, and subsequent drying of the air as it descends the opposite side - creating arid conditions inland.

Initially, winds carrying moisture approach the coast (1) and are pushed upward along the mountain’s windward slope (2). As the air rises, it cools adiabatically, causing water vapour to condense into clouds (3 to 4). This results in heavy precipitation on the windward side (5), saturating the atmosphere. By contrast, the now-dry air continues over the mountain crest (6) and descends the leeward slope, warming and absorbing moisture from the land below. Consequently, the inland areas receive little to no rainfall, forming a rain-shadow desert (7), located thousands of kilometres from the coast.

Notably, the stark contrast between the wet windward side and the arid leeward side highlights the orographic effect’s decisive role in regional climate differentiation

AI examiner evaluation

Task Achievement / Task Response — Band 8.0

The student covers all parts of the task extremely well, successfully summarising the seven-stage process of rain-shadow desert formation. The response includes a clear, concise overview in the second paragraph that outlines the entire mechanism from maritime moisture acquisition to inland aridity. Key features shown in the visual data—such as winds approaching the coast, orographic uplift, cooling, cloud formation, precipitation on the windward side, and the subsequent dry descent creating a desert—are accurately reported and logically integrated without unnecessary repetition. The position and geographical relationship of the features are fully addressed, meeting all requirements for Band 8.

Coherence and Cohesion — Band 8.0

The text is logically sequenced and flows smoothly from introduction to overview, body stages, and a concluding analytical summary. Cohesive devices are managed skilfully and unobtrusively, using transitions such as 'Initially', 'As the air rises', 'By contrast', and 'Consequently' to guide the reader through the sequential steps of the diagram. Paragraphing is used appropriately, separating the introductory overview from the detailed breakdown of stages and the concluding note. Referencing is consistently clear throughout, earning a strong Band 8 score for cohesion and progression.

Lexical Resource — Band 8.0

The student demonstrates a wide, flexible, and precise lexical range tailored to an academic process description. Less common lexical items are used skilfully and accurately, such as 'maritime air', 'adiabatically', 'orographic effect', and 'climate differentiation'. Word choice and collocations are natural (e.g., 'heavy precipitation', 'arid leeward side'), with only rare minor instances of phrasing that could be slightly more polished. The vocabulary easily satisfies the criteria for Band 8.

Grammatical Range and Accuracy — Band 8.0

The response features a wide range of complex sentence structures used with a high degree of flexibility and accuracy (e.g., participial phrases like 'leading to condensation, rainfall... and subsequent drying'). The majority of sentences are completely error-free, demonstrating excellent control over grammar, punctuation, and clause subordination. Only very occasional minor slips or stylistic inelegancies might be noted, but overall syntactic control is robust, fully justifying a Band 8.

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

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