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1 markWater and Waste Management

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

Water purification and disease prevention.

Explain why fluoride is sometimes added to drinking water.

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Other parts of this question

  1. 13(a)(i)List the first THREE steps in the large-scale water purification process prior to chlorination.[3 marks]
  2. 13(a)(ii)State the function of chlorination in water purification.[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]

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