Band 6.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.5 · IELTS Momentum Workout · 2026-10-17

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 6.5)

The diagram illustrates how a mechanical arm operates and demonstrates the function of its joints, which are similar to those of a human arm.

Overall, the mechanical arm is controlled by a computer connected to three motors, while its various joints enable movement and flexibility. It also has gripper that can replaced with different tools to perform specific task.

The process begins with a computer that controls the three motors responsible for arm's movement. The base is generally stationary, although it can ocassionaly move. Above the base, the shoulder joint allows the arm to be raised and lowered, while pivot enables it to rotate. The elbow joint provides flexibility, allowing the arm to bend. Additionaly, the wrist enables the gripper to flex or rotate.

At the end of the arm, the gripper uses built in sensors to control the force applied when handeling objects. Alternatively, it can be replaced with some tools such as, spray paint , drill holes, weld metal etc.

AI examiner evaluation

Task Achievement / Task Response: Band 7.0

You give a clear overview of the computer-controlled motors and the movement provided by the joints, and you cover the main components from the base to the gripper. The descriptions of the shoulder, pivot, elbow and wrist are generally consistent with the diagram, as is the note that the gripper can be replaced by tools for different tasks. This is a well-focused summary of the key features. Some details could be more precise: the diagram shows three motors connected to different parts of the arm, but their individual roles are not explained, and the alternative end-effectors are listed as actions rather than clearly identified tools. Clarifying these relationships would make the account more fully developed.

Coherence and Cohesion: Band 7.0

The response is organised effectively into an introduction, an overview and two paragraphs describing the arm’s components and end-effector. The sequence from the computer and base through the joints to the gripper is easy to follow, and linking expressions such as “Overall,” “Above the base,” and “Alternatively” help guide the reader. The progression is clear throughout. To make the connections even more precise, use reference words and transitions that show how the parts relate—for example, explain that the shoulder and pivot sit above the base before describing their functions. The final list of alternative uses feels slightly abrupt; a complete sentence linking each tool to its task would provide a smoother ending.

Lexical Resource: Band 6.0

You use an adequate range of relevant vocabulary, including “mechanical arm,” “joints,” “flexibility,” “pivot,” and “built in sensors,” and most choices communicate the diagram’s features clearly. There are also useful attempts at more specific language, such as “raised and lowered” and “force applied.” However, some word choices and collocations are imprecise: “tools such as, spray paint, drill holes, weld metal” mixes tools with actions, while “some tools” is vague. Spelling slips such as “ocassionaly,” “Additionaly,” and “handeling” also reduce accuracy. Name the end-effectors as a spray gun, drill and welding equipment, and use the corresponding verbs to describe their functions.

Grammatical Range and Accuracy: Band 6.0

You use a mix of simple and complex sentence forms, including a relative clause in “the gripper uses built in sensors to control the force applied when handling objects” and a contrast clause in “although it can occasionally move.” Most sentences remain understandable, but some grammatical errors persist. In the overview, write “a gripper that can be replaced,” rather than “has gripper that can replaced”; the latter omits an article and the passive auxiliary. Articles are also missing in “the pivot enables it to rotate” and “responsible for the arm’s movement.” The final list is not integrated into a complete grammatical structure. Check articles, passive verb forms and sentence punctuation to improve control while retaining your varied sentence patterns.

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