Band 6.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 6.0 · IELTS Momentum Workout · 2026-10-14

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 diagram demonstrates the function of a mechanical arm and how its joints work as same as a human arm.

The mechanical arm powered by three different motors which gets their power from the computer. There are also some alternative tools to the arms different joints.

First, a computer gives precision control of 3 motors which are connected to the different joints of the arm. Then, the first motor provides power to the arms shoulder which is mounted on the base. Shoulder includes a pivot which helps it to rotate and it also raises and lowers arm like us human.

Second motor gives power to elbow which allows the wrists movement and gives flexibility to the wrist just like we move our wrists using our elbow. And, the last motor controls the arms wrist that enables gripper to rotate and the gripper can be replaced by different alternative end effectors. At last, the gripper has built in sensor control force which allows it to hold or move things.

AI examiner evaluation

Task Achievement / Task Response: Band 5.5

You identify the computer, three motors, the arm’s joints, the gripper and alternative end-effectors, so the response is relevant and covers several key features. However, the account misassigns some functions: the first motor is not described as powering the shoulder, and the second motor is linked to the elbow, whereas the diagram connects the motors to the elbow, arm section near the wrist, and gripper. The shoulder raises and lowers the arm, while the pivot enables rotation; these are presented as if the pivot were part of the shoulder. The overview is also limited: it would be clearer to summarise how the computer-controlled motors operate the arm and how its end-effector can be changed, then describe the components accurately.

Coherence and Cohesion: Band 6.0

The response has a clear overall sequence, moving from the computer and motors to the joints and gripper. Paragraph breaks help distinguish the introduction from the explanation, and “First,” “Second motor,” and “At last” signal progression. However, the sequence is not consistently easy to follow because the motor-to-joint connections are described inaccurately, and the repeated “which” clauses make relationships between parts less clear. The opening paragraph also introduces alternative tools without explaining them until later. Grouping the description by the arm’s structure—from base and pivot, through shoulder and elbow, to wrist and gripper—would create a more logical progression, with linking phrases used to show each component’s function.

Lexical Resource: Band 6.0

You use a suitable range of task-related vocabulary, including “precision control,” “pivot,” “flexibility,” “gripper,” and “alternative end effectors.” These terms help communicate the diagram’s technical subject, and the meaning is generally understandable. Some choices are imprecise or awkward, however: “tools to the arms different joints” confuses tools with joints, while “built in sensor control force” does not clearly express that sensors control the force applied by the gripper. “Work as same as” is also an unnatural way to describe the comparison with a human arm. Aim for precise collocations such as “components,” “function in a similar way,” and “sensors regulate gripping force,” and use hyphenation consistently in terms such as “built-in.”

Grammatical Range and Accuracy: Band 5.5

You attempt both simple and more developed sentences, including clauses with “which” and a comparison using “just like.” The main ideas can usually be understood, but some grammatical errors remain. For example, “The mechanical arm powered by three different motors” needs a finite verb (“is powered”), and “which gets their power” has a pronoun-agreement problem. Articles and possessives are also inconsistent in phrases such as “raises and lowers arm” and “arms shoulder.” The sentence beginning “Second motor gives power” is not a complete, well-formed continuation, and the comma after “And” is unnecessary. Check that each sentence has a clear subject and verb, and review articles, agreement, and punctuation when editing.

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