Band 5.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 5.5 · IELTS Complete Catalyst · 2026-08-17

IELTS Writing Task 1 question

The diagram below shows the process for making a water clock.

Write a report for a university lecturer describing the information below.

HOW TO BUILD YOUR OWN WATER CLOCK

Student answer (Band 5.5)

A water clock, also called a clepsydra, is one of the oldest devices used to measure time. Unlike modern clocks that use batteries or electricity, a water clock uses the steady movement of water to show the passing of time. Making a simple water clock at home is an interesting science project that helps us understand how people measured time in ancient times.

To build a simple water clock, we need a plastic bottle or container, water, a pin or needle, a marker, and a cup to collect the water. First, make a very small hole near the bottom of the plastic bottle. Fill the bottle with water and place it above the empty cup. As the water slowly flows through the hole, mark the level of water in the bottle at regular time intervals, such as every five or ten minutes. These marks can then be used to estimate the time.

The most important part of a water clock is controlling the flow of water. If the hole is too large, the water will flow out quickly and the clock will not measure time accurately. If the hole is too small, the water may take too long to flow. The water level also affects the speed of the water, so a simple water clock may not keep perfectly equal intervals. For a better design, a container with a carefully controlled opening can be used.

Building a water clock is both educational and enjoyable. It shows how the movement of water can be used to measure time without modern technology. Ancient civilizations used water clocks for activities such as observing the night sky, organizing daily activities, and measuring periods of time. By making our own water clock, we can learn about science, history, and the importance of accurate timekeeping.

In conclusion, a homemade water clock is a simple experiment that demonstrates an important idea: the regular flow of water can be used to measure the passage of time. It is an easy project that can be made with common materials and provides a practical way to learn how early timekeeping devices worked.

AI examiner evaluation

Task Achievement / Task Response — Band 4.0

The response fails to meet the requirements of an Academic Task 1 report. Instead of objectively describing the process shown in the diagram, the student has written an essay that explains the history of water clocks and provides a tutorial on how to build one. The task requires a clear, analytical summary of the steps involved in the provided diagram. By including personal commentary, historical context, and instructional language (e.g., 'we need', 'making a simple water clock is an interesting science project'), the response deviates from the required formal, descriptive tone. To improve, focus strictly on the visual information provided and describe the stages of the process objectively.

Coherence and Cohesion — Band 6.0

The essay is organized into logical paragraphs, and there is a clear introduction and conclusion. Cohesive devices such as 'First', 'In conclusion', and 'Unlike' are used to link ideas. However, because the content is not a report of a process but rather an essay, the progression of ideas feels more like an article than a technical description. The paragraphing is sufficient, but the overall structure does not serve the purpose of a Task 1 response, which should focus on the sequential stages of the diagram rather than thematic discussion.

Lexical Resource — Band 6.0

The vocabulary is generally appropriate and clear, allowing the reader to follow the instructions provided. There is a good range of topic-specific vocabulary such as 'clepsydra', 'intervals', 'accurately', and 'timekeeping'. However, the language is somewhat informal and repetitive in its structure. To reach a higher band, the student should incorporate more precise, academic vocabulary related to process description, such as 'depicted', 'illustrates', 'subsequently', and 'facilitates', rather than using conversational phrases like 'interesting science project'.

Grammatical Range and Accuracy — Band 6.5

The grammar is generally accurate, with a mix of simple and complex sentence structures. There are very few errors, and the meaning is always clear. The student demonstrates control over punctuation and sentence construction. However, the range of complex structures is somewhat limited. To improve, the student should aim to use more varied grammatical forms, such as passive voice constructions (e.g., 'the bottle is filled with water'), which are essential for describing processes in an academic context.

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

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.