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CAPE Environmental Science Unit 2 · 2011 · Paper 2 · Question 5(d)(ii)

Table 3 presents pesticide concentrations across aquatic trophic levels, where canal water concentration is 0.0003 ppm.

Calculate the minimum concentration factor of the pesticide in the tertiary consumers.

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Other parts of this question

  1. 5(a)What are 'secondary air pollutants'?[3 marks]
  2. 5(b)(i)Complete Figure 5 to show ONE pathway by which the pesticide may enter humans.[1 mark]
  3. 5(b)(ii)Complete Figure 5 to show ONE pathway by which the pesticide may enter oceans.[1 mark]
  4. 5(c)Identify the processes in Figure 5 which are labelled A, B, C and D.[4 marks]
  5. 5(d)(i)State THREE inferences that may be drawn from the results presented in Table 3.[3 marks]
  6. 5(d)(iii)Explain the pattern of pesticide concentration in the ecosystem that is shown in Table 3.[6 marks]

More practice: the rest of this paper · more Pollution Concepts, Pathways, and Receptors questions · all CAPE Environmental Science Unit 2 past papers