Quelpr
3 marksWater and Waste Management

CSEC Human and Social Biology · May/June 2009 · Paper 2 · Question 13(a)(i)

Water purification and disease prevention.

List the first THREE steps in the large-scale water purification process prior to chlorination.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 13(a)(ii)State the function of chlorination in water purification.[1 mark]
  2. 13(a)(iii)Explain why fluoride is sometimes added to drinking water.[1 mark]
  3. 13(b)(i)Suggest TWO effects of obesity other than coronary heart disease.[2 marks]
  4. 13(b)(ii)Identify TWO school activities that can be undertaken to prevent obesity.[2 marks]
  5. 13(b)(iii)Provide a report discussing THREE effects of alcohol on the human body and TWO effects of alcoholism on society.[5 marks]
  6. 13(b)(iv)Identify TWO signs or symptoms of gonorrhoea and TWO signs or symptoms of syphilis.[4 marks]
  7. 13(b)(v)Suggest ONE method of treatment for gonorrhoea and ONE method of treatment for syphilis.[2 marks]

More practice: the rest of this paper · more Water and Waste Management questions · all CSEC Human and Social Biology past papers