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3 marksWater and Land Pollution

CAPE Environmental Science Unit 2 · 2014 · Paper 2 · Question 5(b)(i)

Table 4 provides characteristics of two large ponds (A and B) affected by nitrate-contaminated effluents.

Explain why the average nitrate concentrations in the two ponds are so different, even though the concentration of nitrate entering each pond is the same.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 5(a)Correctly match each pollutant with its corresponding source.[3 marks]
  2. 5(b)(ii)State the name of the MOST likely environmental impact that will occur in Ponds A and B and discuss how this impact will affect the ponds.[6 marks]
  3. 5(b)(iii)Suggest ONE measure that could be taken to mitigate the environmental impact identified in (b)(ii).[1 mark]
  4. 5(b)(iv)State whether the measure suggested in (b)(iii) would be effective, giving ONE reason for your answer.[2 marks]
  5. 5(c)(i)State how long it took for the river to show the effects of the rainfall event.[1 mark]
  6. 5(c)(ii)State when turbidity was at its maximum.[1 mark]
  7. 5(c)(iii)Assess the statement: 'Five hours is a suitable experimental time for the river to achieve its pre-rainfall event turbidity.'[3 marks]

More practice: the rest of this paper · more Water and Land Pollution questions · all CAPE Environmental Science Unit 2 past papers