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 levels in the mouthan acid level in mouth from the moment of consumption up to 40 minutesthe moment to 40 minutes after the consumption of sweet foods, namely fruit sugar, cane sugar and honey.
Overall, the acid level reported a sharp drop followed by a gradual recoveryslight fluctuations over the forty-minute period.
The pH level wasAcid level was at its highest, at a pH of 7at 7 PH level, the moment after the sweet food consumptionconsumtion. The PH level dropped sharply within the first 5 minutes afterstarted to drop 5 minutes after eating the food. In addition, cane sugar causedreported the sharpest decrease from pH 7 to approximately 3.5from 7 PH to approximately 3.5 PH, which was followed by fruit sugar at nearly 4.2 PH and honey atthe honey at roughly 4.9 PH. Between 5 and 10 minutes after eating honey the PH level remained stable. As for the cane and fruit sugars, the level started to rise after 5 minutes, which was followed by the honey after 10 minutes.
Furthermore, 25 minutes after the honey intake, the pH level reboundedph level bounded to its peak, to 7 PH. As for the fruit sugar, its level continuedcontinues to rise marginally, before reaching pH 7 after 35 minutes7Ph after 35 minutes. Lastly, cane sugar took no less than 40 minutes to return to neutral pH 7get to 7Ph.
Why this response received Band 6.0
The response successfully outlines the overall trends in pH changes over time for all three sweet substances. However, it completely omits the critical 5.5 pH threshold line and its implications for dental health, which is a central requirement of the task prompt. To improve, ensure all key visual reference points and prompt instructions are explicitly addressed in the body paragraphs and summary.
IELTS Writing Criteria Scores
Task Achievement
The response identifies the main numerical points for each food item, but it fails to mention the key 5.5 pH danger line for tooth decay.
Explicitly highlight the critical threshold line where tooth decay occurs and connect the data directly to dental health implications.
Coherence and Cohesion
Information is arranged in a clear chronological order across paragraphs with appropriate basic linking words.
Vary cohesive phrases beyond repetitive transitional markers like 'as for' and 'which was followed by'.
Lexical Resource
A satisfactory range of trend vocabulary is used, though there are noticeable spelling and capitalization mistakes.
Proofread carefully to fix spelling errors such as 'consumtion' and ensure consistent capitalization of units like 'pH'.
Grammatical Range and Accuracy
Sentence structures are generally varied and clear, though minor tense inconsistencies and awkward phrasing occur.
Maintain a consistent past tense when describing historical experiment results rather than shifting into the present tense.