Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · IELTS Momentum Workout · 2026-10-01

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 7.0)

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 5.5

The response addresses the main components of the diagram, explaining the general mechanism of the robotic arm, the computer-controlled motors, and the alternative end-effectors. However, the report is somewhat incomplete because it omits several key structural features presented in the visual data. Specifically, it fails to mention the base, the pivot that enables the arm to rotate, the shoulder that raises and lowers the limb, and the wrist section that allows the gripper to flex or rotate. Furthermore, while the description explains the functions of the elbow and the gripper well, the overall account tends to focus heavily on textual labels rather than synthesising the spatial relationships and mechanical interactions effectively. To reach a higher band, all prominent mechanical elements shown in the diagram must be included, providing a more comprehensive overview of the entire system's anatomy.

Coherence and Cohesion: Band 7.0

The report demonstrates clear logical organisation and progression throughout. The writing is divided into logical paragraphs, beginning with an introductory overview, followed by a general summary of the system, a detailed breakdown of command and propulsion, and finally a description of the functional end of the arm. Cohesive devices are used flexibly and appropriately, such as 'In terms of command and propulsion,' 'Alternatively,' and 'These interchangeable tools include.' Paragraphing is managed effectively, and referencing is clear, with pronouns and demonstratives like 'These components' and 'Each motor' linking ideas smoothly without mechanical repetition. Progression is maintained from the central command system down to the individual joints and terminal tools, resulting in a cohesive and easy-to-follow text.

Lexical Resource: Band 8.0

The lexical resource is a strong point in this response, demonstrating a wide, fluent, and flexible range of vocabulary. The writer skilfully uses uncommon industrial and anatomical terminology such as 'operational mechanism,' 'structural joints,' 'centralized digital command,' 'physical articulation,' and 'end-effectors.' Word choice and collocations are used with precision, as seen in phrases like 'precision control over three distinct motors,' 'multi-directional movement,' and 'industrial requirement.' There are virtually no spelling or word-choice errors, and the vocabulary creates a formal, academic tone suited to an IELTS task of this type. The control of less common lexical items is confident throughout.

Grammatical Range and Accuracy: Band 7.5

The response exhibits a wide variety of complex sentence structures with good control over grammar and punctuation. The majority of sentences are error-free, featuring well-constructed subordinate and relative clauses, such as 'which mimics human anatomy to allow multi-directional movement' and 'depending on the industrial requirement.' Verb forms, tenses, articles, and prepositions are handled accurately, and punctuation is managed cleanly throughout the text. While minor slips can occasionally limit a higher score, the grammar here shows a strong command of complex forms, including participial phrases and compound-complex sentences, ensuring that the meaning is communicated clearly and effortlessly.

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

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