Band 8.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 8.0 · IELTS Momentum Workout · 2026-09-26

IELTS Writing Task 1 question

The diagram below shows how a mechanical arm works, and how the joints that make up the arm function in the same way as those in a human arm. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 8.0)

The diagram illustrates the operational mechanism of a robotic arm and shows how its structural joints mimic the functionality of a human counterpart to perform various tasks.

Overall, the system relies on centralized digital command to regulate multiple specialized motors. These components collectively coordinate the physical articulation of the limb and its customizable endpoints.

In terms of command and propulsion, a central computer dictates the system by providing precision control over three distinct motors. Each motor is responsible for a dedicated section of the apparatus. The first motor drives the elbow joint, which mimics human anatomy to allow multi-directional movement and provide structural flexibility. The second motor dictates the primary arm shaft, while the third manages the terminal gripper mechanism.

At the functional end of the arm, the standard gripper utilizes built-in sensors that actively monitor and regulate the amount of force applied. Alternatively, this gripper can be swapped with various specialized end-effectors depending on the industrial requirement. These interchangeable tools include a paint sprayer, a drilling attachment for creating holes, and a welding tool for fusing metal.

AI examiner evaluation

Task Achievement / Task Response: Band 8.0

The student has successfully covered all parts of the task by reporting the main features of the mechanical arm diagram. The overview accurately captures the core function, noting how digital commands regulate motors to coordinate articulation. Key features such as the base, pivot, shoulder, elbow, wrist, and gripper are correctly identified and described. Furthermore, the alternative end-effectors (paint sprayer, drill, and welding tool) are appropriately integrated into the summary. The details match the visual data closely without including unnecessary invention, satisfying the requirements for a Band 8 level.

Coherence and Cohesion: Band 8.0

The response is logically sequenced and easy to follow. Information is organized into a clear introductory overview, a general summary paragraph, followed by specific details regarding command propulsion and functional end-parts. Cohesive devices are used naturally throughout the text (e.g., 'Overall', 'In terms of', 'Alternatively'), and paragraphing is managed effectively to group related concepts, resulting in a cohesive and coherent layout that aligns well with Band 8 descriptors.

Lexical Resource: Band 8.5

The student demonstrates a wide and flexible vocabulary range suited to an academic description. Words and phrases like 'operational mechanism', 'structural joints', 'centralized digital command', and 'interchangeable tools' are used accurately and with good awareness of collocation and style. There are no noticeable lexical errors or awkward word choices, showcasing a sophisticated control of language appropriate for a high band.

Grammatical Range and Accuracy: Band 8.0

A wide variety of complex sentence structures is used effectively throughout the text, such as participial phrases ('mimicking human anatomy to allow multi-directional movement') and multi-clause sentences. The majority of the sentences are completely error-free, and punctuation is handled with precision. Grammatical control is strong and consistent, matching the criteria for a Band 8 performance.

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

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