CAPE Environmental Science Unit 1 · 2009 · Paper 2

34 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)4 marksDefine what is meant by 'limiting factor' and state THREE ways in which limiting factors operate.
2. 1(b)4 marksWith reference to Figure 1, describe how the population size of the algal species changes with the variation in nutrient concentration.
3. 1(c)(i)8 marksFor the relationship between population size of algae and nutrient concentration in Figure 1, explain using EIGHT points how nutrient variation impacts the algae population.
4. 1(c)(ii)4 marksExplain using FOUR points how the variation in the algae population impacts the population of other species in the ecosystem.
5. 2(a)3 marksDistinguish between 'primary ecological succession' and 'secondary ecological succession'.
6. 2(b)(i)5 marksOn the axes provided in the insert, illustrate the data shown in Table 1 as a bar chart.
7. 2(b)(ii)a)2 marksUsing Table 1, identify the country where secondary ecological succession is: - MOST likely to occur - LEAST likely to occur.
8. 2(b)(ii)b)10 marksProvide FIVE reasons to support your answer in EACH case in (ii) a) above.
9. 3(a)4 marksWith reference to Figure 2, describe the variation in the population size of BOTH organisms over the eight-month period.
10. 3(b)4 marksOutline how predation may be of benefit to the prey population represented in Figure 2.
11. 3(c)4 marksExplain how ONE density independent factor may impact the size of the snail population.
12. 3(d)8 marksAssess TWO possible impacts on the ecosystem if the population of snails is significantly reduced by draining the waterway.
13. 4(a)4 marksDescribe the relationship between per capita GDP and the level of poverty existing in countries.
14. 4(b)(i)4 marksOutline the relationship between total fertility rate and per capita GDP based on the graph in Figure 3.
15. 4(b)(ii)12 marksExplain how the level of poverty in countries accounts for the relationship outlined in (b)(i).
16. 5(a)4 marksDescribe how the growth rate of the population changed between 1908 and 2000.
17. 5(b)6 marksCalculate the doubling time of the population if its rate of growth remains constant beyond 2000.
18. 5(c)4 marksOutline TWO factors that may be responsible for the changes in the growth rate of the population since 1928.
19. 5(d)6 marksAssess the role of government policies in controlling population growth rate, including SIX points.
20. 6(a)4 marksCalculate the percentage difference in the per capita water consumption between developing and developed countries.
21. 6(b)4 marksDescribe an environmental impact associated with high per capita water consumption.
22. 6(c)4 marksAccount for the difference in per capita water consumption between developing and developed countries.
23. 6(d)8 marksAssess the statement 'The high consumption patterns of developed countries are responsible for the world's environmental degradation' in light of current world population distribution.
24. 7(a)4 marksBased on the results depicted in Figure 5, compare the environmental impact of extracting these two resources, including FOUR points.
25. 7(b)4 marksAccount for the difference in the level of noise pollution when these two resources are extracted, including FOUR points.
26. 7(c)12 marksDiscuss THREE factors (excluding environmental) that the Government should consider before permitting the extraction of these two resources.
27. 8(a)4 marksDescribe ONE function of mangrove ecosystems.
28. 8(b)(i)2 marksWhat can you deduce from the information presented in Table 3?
29. 8(b)(ii)2 marksJustify your response in (b)(i).
30. 8(c)(i)6 marksDescribe the effect that reduced freshwater flow through mangrove ecosystems could have on mangrove ecosystems, including SIX points.
31. 8(c)(ii)6 marksDescribe the effect that discharge of sewage in mangrove ecosystems could have on mangrove ecosystems, including SIX points.
32. 9(a)4 marksWith reference to Figure 6, comment on the trend in the tourism travel market from 1985 to 2005.
33. 9(b)4 marksState FOUR possible reasons for the trend shown in Figure 6.
34. 9(c)12 marksDiscuss THREE ways in which ecotourism can be used as a tool for the conservation of natural resources.