CAPE Environmental Science Unit 2 · 2012 · Paper 2

32 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)3 marksState THREE characteristics of subsistence agricultural systems.
2. 1(b)6 marksDiscuss, giving THREE reasons, why natural disasters are threats to sustainable agriculture.
3. 1(c)(i)3 marksStudy Figure 1 and make THREE deductions about the impact of agriculture on the environment.
4. 1(c)(ii)2 marksBased on the results depicted in Figure 1, calculate the total percentage impact on water resources, showing your working.
5. 1(c)(iii)6 marksExplain, giving THREE reasons, why land degradation was as high as 42 per cent.
6. 2(a)4 marksState FOUR features of sustainable agriculture.
7. 2(b)4 marksBased on Figure 2, make FOUR deductions on the use of different methods of pest control by the three farms.
8. 2(c)6 marksExplain, citing TWO reasons, why a decline in agricultural production may be detrimental to the economy of some Caribbean countries.
9. 2(d)(i)3 marksDiscuss why agro-forestry is considered an environmentally sustainable agricultural practice.
10. 2(d)(ii)3 marksDiscuss why conservation tillage is considered an environmentally sustainable agricultural practice.
11. 3(a)(i)2 marksDefine the term 'energy efficiency'.
12. 3(a)(ii)3 marksWhat percentage of this country's energy output is in some beneficial form? Show your working.
13. 3(a)(iii)2 marksAssuming a total energy output of 1 x 10^15 BTU, how much energy is lost as unnecessary energy waste?
14. 3(a)(iv)6 marksThe country has a significant amount of energy lost unnecessarily. Suggest THREE ways in which this country could improve its energy efficiency.
15. 3(b)(i)1 markDefine the term 'kinetic energy'.
16. 3(b)(ii)6 marksWith the use of a suitably labelled diagram, explain how wind energy is harnessed to produce electricity.
17. 4(a)4 marksA small Caribbean island state is considering diversifying its energy sources and using less fossil fuels. Suggest TWO reasons why the island is considering diversification, providing ONE economic and ONE environmental…
18. 4(b)(i)2 marksDefine the term 'renewable energy'.
19. 4(b)(ii)6 marksBased ONLY on the information provided in Figure 4, identify THREE types of renewable energy sources that would be suitable for use on the island, and justify your selection of EACH renewable energy source.
20. 4(c)(i)5 marksWhat percentage of the commercial energy used is derived from renewable energy sources?
21. 4(c)(ii)3 marksIn the United States, 7% of the commercial energy used comes from renewable sources. Compare this value with your answer to Part (c)(i), and suggest ONE reason for the difference.
22. 5(a)(i)3 marksDefine the term 'BOD'.
23. 5(a)(ii)1 markHow many times during the monitoring period was the sewage treatment plant malfunctioning?
24. 5(a)(iii)2 marksExplain how you arrived at the answer to (a)(ii).
25. 5(a)(iv)2 marksWhat were the first and last days of the LONGEST plant malfunction?
26. 5(a)(v)1 markOn average, what was the BOD concentration when the plant was operating normally?
27. 5(b)(i)5 marksDescribe the pathway of heavy metal pollution in this section of the river, and use this information to explain why the concentration of heavy metals is much higher in the swamp's oysters than in the river water.
28. 5(b)(ii)6 marksFully discuss ONE possible environmental impact of the effluent from the sewage treatment plant on the river.
29. 6(a)3 marksDefine the term 'pollutant'.
30. 6(b)6 marksDiscuss the statement: 'The institutional framework within a country can be an underlying cause of air pollution', including THREE points in your response.
31. 6(c)(i)6 marksDescribe the formation of acid rain. Appropriate chemical equations are required in your response.
32. 6(c)(ii)5 marksOutline a method to determine if there is an acid rain problem in an entire country, including a description of any experimental techniques needed and explaining how results would be used to arrive at a conclusion.