Besides air and water, what would cause faeces to decompose faster?
It could be due to humidity, temperature or living organisms like worms, according to several science tutors.
This is an example of a "creative" question in this year's Primary School Leaving Examination (PSLE) science paper which experts say reflects the greater emphasis on getting pupils to apply what they learn in the classroom. According to pupils and parents whose children took the exam on Tuesday last week, this year's paper was "interesting", "new" and "tricky".

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