CSEC Human and Social Biology · January 2014 · Paper 2 · Question 4(b)(i)
Identify which component of a sewage treatment plant comes immediately before the activated sludge tank.
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- 4(a)(i)Complete the sentence: Sewage consists of _______ and _______, along with household _______.[3 marks]
- 4(a)(ii)State TWO ways that remote communities could reduce the volume of household refuse produced.[2 marks]
- 4(a)(iii)Explain why dumping household refuse on a vacant lot next to a playground threatens community health.[2 marks]
- 4(a)(iv)Name TWO diseases that may result from this improper disposal of household refuse.[2 marks]
- 4(b)(ii)Compare the functioning of the activated sludge and biological filter tanks, giving TWO similarities and THREE differences.[5 marks]
More practice: the rest of this paper · more Water and Waste Management questions · all CSEC Human and Social Biology past papers