Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · IELTS Momentum Workout · 2026-09-03

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 structure and functions of an industrial robotic arm, which is operated by a computer to perform various tasks with high precision.

Overall, the robotic arm consists of a stationary base, several motors, movable joints, a wrist and a gripper. Different end-effectors can also be attached to the arm, allowing it to perform specialized industrial activities.

The base supports the entire mechanism and can occasionally be moved. Above it, a shoulder joint raises or lowers the arm, while a pivot enables the arm to rotate. The elbow provides flexibility and allows further movement. Three motors, controlled precisely by a computer, power these movements. At the end of the arm, the wrist permits the gripper or another end-effector to rotate. The gripper contains built-in sensors that control the applied force, enabling it to handle objects safely. Alternatively, the gripper can be replaced with tools designed for spray painting, drilling holes or welding metal.

AI examiner evaluation

Task Achievement / Task Response — Band 7.0

The response successfully identifies the main features of the mechanical arm, including the base, joints, and end-effectors. You have clearly described the function of each component and made a relevant comparison to the human arm as requested. The overview provides a concise summary of the mechanism. To reach a higher band, you could have provided more specific detail on the comparative aspect, perhaps by explicitly linking the 'shoulder', 'elbow', and 'wrist' of the machine to their human counterparts more directly. However, the task is fully addressed with a clear, logical focus on the key mechanical processes.

Coherence and Cohesion — Band 7.5

The essay is well-organized with a logical progression of ideas. You start with an introduction, move to an overview, and then detail the specific components in a sequential manner. Paragraphing is used effectively to separate the general description from the technical details. Cohesive devices such as 'Above it', 'while', and 'Alternatively' are used appropriately to guide the reader through the mechanism. The flow is smooth, and the relationship between the different parts of the arm is clearly established, making the text easy to follow.

Lexical Resource — Band 6.5

You demonstrate a good range of vocabulary appropriate for a technical description, using terms like 'end-effectors', 'mechanism', 'precision', and 'stationary'. The word choice is generally accurate and fits the context well. There are no significant errors in spelling or word formation. To improve further, you could incorporate more sophisticated collocations or precise technical terminology to describe the movement or the interaction between the components, which would elevate the response to a more academic level.

Grammatical Range and Accuracy — Band 7.0

The grammar is strong, with a good mix of simple and complex sentence structures. You use passive voice appropriately ('is operated by', 'can be replaced') to describe the mechanical processes, which is ideal for this type of task. Punctuation is accurate, and there are very few grammatical errors. The sentences are clear and well-constructed. To achieve a higher score, you could experiment with a wider variety of complex sentence structures, such as using more advanced subordinating conjunctions or participle clauses to describe the arm's movements more fluidly.

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

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