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2 marksWater and Land Pollution

CAPE Environmental Science Unit 2 · 2018 · Paper 2 · Question 6(b)(ii)

A student conducted an experiment to test whether heavy metals leach from incinerator ash used in road paving. 100 mL of distilled water was poured over 100 g of incinerator ash (Bottle A) and 100 g of clean sand (Bottle B), and the filtrate was analysed (Table 4).

Why is Bottle B included in the experiment?

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Other parts of this question

  1. 6(a)(i)Explain the method of waste minimization demonstrated by Process A in Figure 4.[3 marks]
  2. 6(a)(ii)Discuss TWO advantages and TWO disadvantages of implementing the waste minimization method demonstrated by Process A.[8 marks]
  3. 6(b)(i)What is the hypothesis of this experiment?[1 mark]
  4. 6(b)(iii)What conclusion should be drawn from the results of this experiment? Justify your answer.[3 marks]
  5. 6(c)List THREE heavy metal pollutants, other than arsenic, cadmium and chromium.[3 marks]

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