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.
Sample Response
The line graph illustrates how the lower pH levels in the mouth, which are causedproduced by eating sweets, causecauses tooth decay. It is clear that the acid levels are inversely proportionalindirectly proportionate to the pH levels and a pH level below 5.5pH level less than 5.5 can lead to tooth decayis favourable to tooth decay. TheTo launch into the topic, Undoubtedly, the highest levels of acidityhighest acidic levels are due to cane sugar which causes the pH to fall to 3.5causes pH 3.5 within 5minutes and this unsafe pH level remainsthese unsafe levels maintain for up to half an hour after consumptionup to half an hour after consumption. Then the second given cause to drop pH level(4) in the mouth is fruit sugar and it takes approximately 20 minutes to level off. Moreover, the third substance shownthe last but not least important cause given here is honey. Although honey causesThough it resulted in the mouth's pH to fall to just under 5soaring mouth pH level up to 5, it rises above the tooth-decay thresholdit drops down to a healthy level about 15 minutes after consumptionwithin 10 minutes after consumption. To summarise, even though, the given sweet foods increase mouth acid levels within the span of 10 minutes, they take exactly 40 minutes to reach pH 7 after eating which is the safest level that does not cause tooth decay.
Why this response received Band 6.0
The response identifies the main relationship between low pH and decay risk and correctly notes that cane sugar causes the deepest and longest fall. However, it misrepresents honey's movement and recovery and incorrectly claims that all three substances return to pH 7 after exactly 40 minutes. The highest-priority improvement is to compare the three recovery times accurately, especially honey at about 25 minutes, fruit sugar at 35, and cane sugar at 40.
IELTS Writing Criteria Scores
Task Achievement
The response identifies the decay threshold and the strongest initial pH fall, but it reports honey's pattern and the final recovery times inaccurately.
Distinguish the recovery curves clearly: honey reaches pH 7 at about 25 minutes, fruit sugar at 35 minutes, and cane sugar at 40 minutes.
Coherence and Cohesion
The information progresses from the overall relationship to each substance and a conclusion, although the single dense paragraph and formulaic linking weaken organisation.
Separate the overview from the detailed comparisons and use simple, accurate transitions instead of phrases such as 'To launch into the topic'.
Lexical Resource
There is sufficient topic vocabulary to describe acidity and decay, but several word choices and collocations are awkward or imprecise.
Use precise graph language such as 'falls to', 'remains below the threshold', and 'recovers to' when describing pH changes.
Grammatical Range and Accuracy
A mix of simple and complex structures conveys the main meaning, but agreement, article, punctuation, and clause-control errors recur.
Check subject-verb agreement and sentence boundaries, particularly in long sentences containing several comparisons and time expressions.
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IELTS Academic Writing Task 1
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.
Your response
Write the task yourself, then compare your choices with the annotated response.