CSEC Integrated Science · 2007 · Paper 2 · Question 4(b)(ii)
Explain how EACH process helps to purify the water.
The mark scheme is shown once you've answered.
Practise this questionOther parts of this question
- 4(a)State TWO chemical and TWO physical properties of water.[4 marks]
- 4(b)(i)Name TWO processes used by a local water company to purify water for domestic use.[2 marks]
- 4(c)(i)Use FOUR of the organisms shown in Figure 5 to draw a food chain.[2 marks]
- 4(c)(ii)Identify ONE activity on the farm shown in Figure 5 that could have a negative effect on the river.[1 mark]
- 4(c)(iii)Explain how this farm activity results in the negative effect.[1 mark]
- 4(c)(iv)Identify ONE activity of the factory shown in Figure 5 that could have a negative effect on the river.[1 mark]
- 4(c)(v)Explain how this factory activity results in the negative effect.[1 mark]
- 4(d)Explain why the dead fish should NOT be collected and sold.[1 mark]
More practice: the rest of this paper · more Water and the Aquatic Environment questions · all CSEC Integrated Science past papers