Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · IELTS Momentum Workout · 2026-10-09

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 4.0)

The diagram illustrates the various stages involved in the production of mechanical ars works.

overall, it is evident that the process consists of servel stages, beggining with the collection computer of computer precision control of motors ending with the alternative end effectors. the entire production involves many items in the allows

Imtiallym, control of motors passed through a motor showing the following this works undergo a firstly motor allows the elbow of movement it gives flexibillity which is neccesary items in in motor added to ensure that it safe consumption, subsequently they through gripper built in sensors control face in the machinical stage empty of wrist gripper or altenrnative efect to flex rotate to shoulder to raises arm it through pivot enables arm rotate which is through shoulder raises lowes arm at the base of usualllu use stationary and noccasionally movable

AI examiner evaluation

Task Achievement / Task Response: Band 3.5

You identify several relevant components, including the computer, motors, elbow, gripper, wrist, shoulder, pivot and base, and you mention that the base is usually stationary but can sometimes move. However, the response does not clearly summarise how the arm is arranged or how its joints function, and some relationships are difficult to understand. The diagram shows a computer controlling three motors, with the arm’s shoulder, elbow and wrist enabling movement and the gripper applying controlled force; these key features are not explained coherently. The alternative end-effectors are mentioned, but their uses—spraying paint, drilling and welding—are omitted. The response is also 9 words below the required minimum. Include a clear overview and report the main functions and alternatives accurately.

Coherence and Cohesion: Band 3.5

There is an attempt to organise the response with an opening, an overview and a sequence beginning with “Initially” and “subsequently.” You also use a few linking expressions, which shows some awareness of progression. However, the ideas do not form a clear sequence: the description moves from the motors to the elbow, gripper, wrist, shoulder and base without explaining how these parts connect. The overview sentence is difficult to follow, and the final long sentence combines several components without clear boundaries. Use separate paragraphs for the overview and the main description, then present the arm from its base and shoulder through to the gripper. Shorter sentences and clearer links would make the relationships easier to follow.

Lexical Resource: Band 4.5

You use some task-related vocabulary, including “precision control,” “flexibility,” “built-in sensors,” “pivot” and “alternative end effectors.” These terms show an attempt to describe the diagram rather than relying only on general language. However, frequent spelling errors and inaccurate or unclear word choices make parts of the response difficult to interpret, for example “mechanical ars works,” “servel stages,” “flexibillity” and “control face.” Some phrases, such as “production of mechanical” and “safe consumption,” do not accurately describe the diagram. Aim for accurate technical terms and check spelling carefully; use “operation” or “structure” rather than “production,” and describe the gripper’s force control directly.

Grammatical Range and Accuracy: Band 4.5

The response attempts to use more than simple statements, including a sentence beginning “Overall” and a sequence with “which” and “subsequently.” This shows some effort to connect ideas and describe functions. However, sentence structures are often incomplete or run together, and grammatical relationships are frequently unclear. For example, “the process consists of servel stages, beggining with the collection computer” lacks a clear grammatical construction, while “which is through shoulder raises lowes arm” does not form a complete clause. Articles, verb forms and sentence boundaries also need attention. Build accurate simple sentences first—for example, “The computer controls three motors”—then add a clear clause explaining each joint’s function. Check punctuation and ensure every sentence has a subject and a finite verb.

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