Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · IELTS Momentum Workout · 2026-10-31

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 6.0)

The given diagram shows how a mechanical arm works and how its joints work the same way as those in human arm. The whole system of motors is controlled by a computer.

There are a total of three motors in mechanical arm. One is in the shoulder, the other in the elbow and the gripper also have one. There is a common base of this arm that is usually stationary but it can move occasionally. There is a pivot which allows the arm to rotate in various directions. Furthermore, there is also a shoulder attached to the base that is used to raise or lower the arm. For the movement of arm, an elbow is connected to the shoulder that provides flexibility to the arm.

To control the force, there is a gripper which have built-in sensors. For the rotation and flexibility of the gripper or any other end-effector, there is a wrist available between the gripper and the elbow. Spray paint, drill holes and weld metal are some alternatives of the gripper.

AI examiner evaluation

Task Achievement / Task Response: Band 6.0

You cover the main components and functions, including the computer-controlled motors, base, pivot, shoulder, elbow, wrist and gripper, and you mention the alternative end-effectors. However, the motor locations are misreported: the diagram shows three motors above the arm, with connections to different parts, not one motor each “in the shoulder,” “in the elbow” and “the gripper.” The response also describes the parts individually rather than giving a clear overview of how the arm’s joints work in a sequence or comparing them with human joints, which is central to the prompt. The functions are generally relevant, but some features are less fully explained. A more accurate overview and clearer comparison would strengthen the report.

Coherence and Cohesion: Band 6.0

The information is arranged in a generally understandable order: you introduce computer control, describe the base and joints, then finish with the gripper and alternative tools. Paragraphing separates the introduction from the details, and linking phrases such as “Furthermore” and “For the movement of arm” help signal progression. However, the body reads mainly as a list of components, rather than showing how the arm’s parts connect and operate together. Some references are also unclear, particularly “There is a common base of this arm” and “For the rotation and flexibility of the gripper,” where the relationships between parts could be stated more directly. Organising the description from the base upwards and using clearer links between stages would make cohesion less mechanical.

Lexical Resource: Band 6.0

Your vocabulary is adequate for describing the diagram, and terms such as “pivot,” “built-in sensors,” “flexibility” and “end-effector” show some relevant technical range. Most word choices communicate the intended meaning, but several phrases are imprecise or awkward: “the joints work the same way as those in human arm,” “a common base,” and “alternatives of the gripper.” The repeated use of “arm” and “there is” also limits variety. Aim for more precise collocations, such as describing the base as supporting the arm and the tools as interchangeable end-effectors. Greater accuracy in these phrases, alongside a few varied verbs for movement and connection, would make the description more natural and precise.

Grammatical Range and Accuracy: Band 5.5

You use a mix of simple sentences and some more developed structures, including “There is a pivot which allows the arm to rotate” and the clause beginning “For the rotation and flexibility…”. The main ideas remain understandable, but some grammatical errors recur. For example, “those in human arm” needs an article, “the gripper also have one” has subject–verb disagreement, and “a gripper which have” repeats that agreement problem. There are also missing articles in phrases such as “in mechanical arm” and “For the movement of arm.” Work on articles and matching singular subjects with singular verbs, then check each sentence for these patterns. More consistently accurate complex sentences would improve control.

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

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