Band 7.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 7.0 · IELTS Momentum Workout · 2026-07-28

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 process chart illustrates the design and mechanical structure of an articulated arm which works indistinguishably similar to a human arm.

Overall, the robotic arm operates through a combination of motors and series of joints which help to mimic a human arm functions. Additionally, the arm have six crucial components which enable its working and is operated with the help of three motors.

To begin with, the computer is accountable for precision control of motors, the motor present in the center is responsible for movement of the elbow, which provides flexibility. Moreover, the main component of the mechanical arm is gripper, the force by the gripper is exerted according to the requirement, as it have sensors to alter the force and alternative end - effectors can be added such as, spray pain, drill bits and weld metal. Furthermore, the gripper is attached to a wrist, which allows it to flex and rotate.

Subsequently, the leftmost motor is responsible for the movement of the base, which is usually stationary but can move according to the requirement. Moreover, the rightmost motor helps in the maneuver of the gripper. Additionally, the shoulder present in the base provides mobility to raise or lower the arm. Finally, the main rotational and directional movements are operated with the help of pivot.

AI examiner evaluation

Task Achievement / Task Response — Band 7.0

The response covers the main features of the mechanical arm, including the role of the motors, joints, and end-effectors. You have successfully identified the key components and their functions, such as the elbow, wrist, and base. However, the description of the diagram is slightly disjointed; while you mention the components, the relationship between the mechanical arm and the human arm could be more explicitly linked in the body paragraphs to better address the prompt's requirement to compare them. The overview is clear, but the body paragraphs could benefit from a more structured approach to grouping the mechanical functions.

Coherence and Cohesion — Band 7.0

The essay is logically organized into an introduction, overview, and two body paragraphs. You use a range of cohesive devices such as 'To begin with', 'Moreover', 'Furthermore', and 'Subsequently'. However, some of these transitions feel slightly mechanical or repetitive. The referencing is generally clear, though the flow between the description of the motors and the specific arm parts could be smoother. Paragraphing is used appropriately to separate the different functional areas of the arm, which helps the reader follow the technical explanation.

Lexical Resource — Band 6.5

You demonstrate an adequate range of vocabulary for the task, using technical terms like 'articulated arm', 'end-effectors', 'precision control', and 'maneuver'. There are some minor inaccuracies in word choice, such as 'spray pain' (likely meant 'spray paint') and 'the arm have' (subject-verb agreement). While you attempt to use less common vocabulary, the precision could be improved to reach a higher band. The vocabulary is sufficient to describe the mechanical process clearly, but lacks the sophisticated collocation expected at the higher levels.

Grammatical Range and Accuracy — Band 6.5

You use a mix of simple and complex sentence structures. However, there are several grammatical errors that occur throughout the text, particularly with subject-verb agreement (e.g., 'the arm have', 'it have sensors') and article usage. While these errors do not impede communication, they are frequent enough to prevent a higher score. Punctuation is generally functional, but some sentences are slightly run-on or lack necessary commas for clarity. Focusing on proofreading for basic agreement errors would significantly improve your accuracy.

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