CSEC Integrated Science · May/June 2014 · Paper 2

48 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)(i)3 marksIdentify the processes represented by arrows A, B and C in Figure 1.
2. 1(a)(ii)2 marksState TWO uses of water for Amelia other than drinking.
3. 1(a)(iii)1 markSuggest ONE reason why Amelia's cousin became very sick after drinking untreated river water.
4. 1(a)(iv)2 marksName TWO methods Amelia's community can use to treat the river water to make it suitable for drinking.
5. 1(b)(i)1 markState ONE effect that cutting down the forest will have on the water cycle.
6. 1(b)(ii)1 markThe logging company plans to replant with trees poisonous to local herbivores. State ONE way this would affect the forest food webs.
7. 1(c)(i)1 markState ONE benefit to the environment of using hydroelectric power.
8. 1(c)(ii)1 markIdentify ONE negative effect on the local environment of building the dam.
9. 1(c)(iii)1 markState ONE way the large lake (dam) may affect the water cycle.
10. 1(c)(iv)1 markName ONE suitable material for making uninsulated electrical lines used to transmit high voltage electricity efficiently over long distances.
11. 1(c)(v)1 markIdentify ONE hazard that can result from these electrical transmission lines.
12. 1(d)(i)4 marksPlot the points representing the data in Table 1 on the grid in Figure 2.
13. 1(d)(ii)2 marksDraw the best smooth curve on the graph to show the trend.
14. 1(d)(iii)1 markLabel the axes on the graph.
15. 1(d)(iv)1 markState an appropriate title for the graph.
16. 1(d)(v)1 markUse the trend shown in the graph to predict the level of dissolved carbon dioxide in the ocean in 2025.
17. 1(d)(vi)1 markUsing the trend in the graph, state a conclusion about the level of carbon dioxide in the ocean over the period 1850–2000.
18. 2(a)(i)2 marksState TWO properties of acids.
19. 2(a)(ii)2 marksState TWO properties of bases.
20. 2(b)(i)1 markGive ONE example of an acid used in the digestive system.
21. 2(b)(ii)1 markGive ONE example of a base used in the digestive system.
22. 2(c)(i)1 markState what the term pH means.
23. 2(c)(ii)1 markIdentify which substance in Table 2 is NOT an acid.
24. 2(c)(iii)1 markIdentify which of the two acids in Table 2 is stronger.
25. 2(d)(i)2 marksGive TWO reasons why bleach is NOT the most appropriate substance to remove the paint.
26. 2(d)(ii)2 marksSuggest a suitable method to remove the paint from her dress and explain how this method works.
27. 2(e)2 marksState TWO safety precautions to follow when using the paint removal method suggested in (d)(ii).
28. 3(a)(i)1 markState which cell represents a plant cell.
29. 3(a)(ii)2 marksGive TWO reasons for your choice in (a)(i).
30. 3(a)(iii)1 markName the cell structure responsible for storing genetic information.
31. 3(a)(iv)1 markName the type of human cell that transports oxygen around the body.
32. 3(b)(i)1 markDistinguish between 'diffusion' and 'osmosis'.
33. 3(b)(ii)1 markIdentify the process that caused the wilting lettuce to become firm after being sprinkled with water.
34. 3(b)(iii)2 marksExplain how this process kept the lettuce firm.
35. 3(b)(iv)1 markSuggest a suitable method, other than sprinkling, that a consumer could use to keep lettuce firm.
36. 3(c)5 marksComplete Table 3 showing the effects of muscle damage on the structure and function of the heart and stomach, and overall body effects.
37. 4(a)2 marksDistinguish between a conductor and an insulator.
38. 4(b)2 marksState ONE example of a conductor used in the kitchen and ONE example of an insulator used in the kitchen.
39. 4(c)3 marksComplete Table 4 by providing the correct colour of wire to be connected to the Live (L), Earth (E), and Neutral (N) contacts.
40. 4(d)6 marksComplete Table 5 by calculating the rating in kW and kWh consumed per day for each appliance, total energy consumed per day, total energy for 7 days, and total weekly cost.
41. 4(e)2 marksState TWO ways energy can be conserved in the home.
42. 5(a)3 marksList THREE components of air.
43. 5(b)(i)4 marksIdentify TWO likely pollutants present in Community A and TWO likely pollutants present in Community B.
44. 5(b)(ii)4 marksFor ONE pollutant from each community, describe its source and how it is distributed in the environment.
45. 5(b)(iii)4 marksOutline TWO effects that the identified pollutants have on living organisms in each community.
46. 6(a)6 marksIdentify and describe briefly the THREE methods of heat energy transfer.
47. 6(b)5 marksOutline a procedure Ravi may have followed to obtain the results in Table 6.
48. 6(c)4 marksDescribe TWO problems people may face when attempting to use solar energy in the Caribbean.