Eating sweet foods produces acid in the mouth, which can cause tooth decay. (High acid levels are measured by low pH values) Describe the information below and discuss the implications for dental health.
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Sample Response
The graph provides a breakdown of acid levelslevel in the mouth from the moment of consumption to 40 minutes after the initialinital intake of sweet foods, namely fruit sugar, cane sugar and honey.
Overall, the acid level showed a sharp dropreported sharp drop in acid level over the forty-minute period.
Acid level was at its highest, at a PH 7 , the moment after the consuming each sweet foodsweet food consumption. The PH level dropped sharply during the first 5 minutes after ingestionstarted to drop 5 minutes after eating the food. In addition, cane sugarthe cane sugar reported the sharpest decrease from PH 7 to approximately PH 3.5 , which was followed by the fruit sugar at nearly PH 4.2 and the honey at roughly PH 4.9. Between 5 and 10 minutes after eating honey, the pH levelhoney the PH level remained stable. In contrast, for both cane and fruit sugar,As for the cane and the fruit sugar, the level started to rise after 5 minutes, which was followed by the honey after 10 minutes.
Furthermore, 25 minutes after the consuming honeyhoney intake, PH level rebounded to its initial levelbounded to its peak, to PH 7. As for the fruit sugar, its level continuedcontinues to rise steadilymarginally, before reaching PH 7 after 35 minutes. FinallyLastly, cane sugar took no less than 40 minutes to get to PH 7.
Why this response received Band 6.0
The response successfully describes the general trends and data points for each sugar type across the 40-minute timeframe. However, it completely omits the critical tooth decay threshold at pH 5.5 and fails to address the prompt's requirement regarding dental health implications. To improve, ensure all major visual elements—especially reference lines and benchmark levels—are incorporated into the overall summary and main body paragraphs.
IELTS Writing Criteria Scores
Task Achievement
Key trends across the time period are described, but the key line indicating the tooth decay threshold and its implications for dental health are entirely omitted.
Explicitly highlight the pH 5.5 threshold line and detail how long each sweet food keeps acidity in the danger zone for tooth decay.
Coherence and Cohesion
Information is organized chronologically across distinct paragraphs, though cohesive devices are occasionally repetitive or mechanical.
Use a wider variety of natural linking expressions instead of relying heavily on repetitive phrases like 'as for' and 'followed by'.
Lexical Resource
The writing demonstrates an adequate range of vocabulary related to trends, though some word choices and collocations are slightly imprecise.
Refine word choices such as 'bounded to its peak' to more accurate vocabulary like 'recovered to its initial level'.
Grammatical Range and Accuracy
A mix of simple and complex sentence structures is used with generally clear meaning, despite several small grammatical errors and typos.
Proofread carefully to fix subject-verb agreements, missing articles, and inconsistent verb tenses.