CSEC Integrated Science · May/June 2011 · Paper 2

57 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)1 markState the kind of energy stored in this food.
2. 1(a)(ii)1 markIdentify the substance combined with carbon dioxide during photosynthesis.
3. 1(b)2 marksDescribe how plants and animals can become fossil fuels.
4. 1(c)(i)1 markName ONE alternative source of energy suitable for electricity generation in this country.
5. 1(c)(ii)1 markName a SECOND alternative source of energy suitable for electricity generation in this country.
6. 1(d)(i)1 markGive ONE disadvantage of the first alternative energy source named in (c) that may cause resistance to its adoption.
7. 1(d)(ii)1 markGive ONE disadvantage of the second alternative energy source named in (c) that may cause resistance to its adoption.
8. 1(e)(i)2 marksName TWO other atmospheric pollutants resulting from increased vehicular traffic.
9. 1(e)(ii)1 markState ONE negative environmental effect of ONE of the pollutants named in (e)(i).
10. 1(e)(iii)2 marksSuggest TWO negative effects of increased atmospheric carbon dioxide levels on the Caribbean environment.
11. 1(e)(iv)2 marksState TWO possible effects of increased air pollution on human health in the Caribbean.
12. 1(f)(i)5 marksOn Figure 1 on page 5, which already shows the curve for USA, plot a graph representing the carbon dioxide emission data for China using the scales provided.
13. 1(f)(ii)1 markLabel the axes on the graph in Figure 1.
14. 1(f)(iii)1 markState an appropriate title for the graph.
15. 1(f)(iv)1 markIdentify the period during which a decrease occurred in carbon dioxide emitted by the USA.
16. 1(f)(v)1 markDetermine the year in which China's carbon dioxide emissions equalled those of the United States.
17. 1(f)(vi)1 markBased on the trends shown, predict which country would produce more carbon dioxide in 2010.
18. 2(a)(i)2 marksState TWO structural similarities between a typical cell of the grass and a typical cell of the rabbit.
19. 2(a)(ii)2 marksState TWO structural differences between a typical cell of the grass and a typical cell of the rabbit.
20. 2(b)(i)1 markIdentify a producer in Figure 2.
21. 2(b)(ii)1 markGive a reason for identifying that organism as a producer.
22. 2(b)(iii)1 markState a likely effect on the food chain if drought kills all the grass in the area.
23. 2(c)(i)4 marksIdentify the parts labelled A, B, C, and D in Figure 3.
24. 2(c)(ii)1 markName the type of tooth shown in Figure 3.
25. 2(c)(iii)1 markName ONE other type of tooth.
26. 2(c)(iv)2 marksSuggest TWO features of a rabbit's teeth that adapt them to its diet.
27. 3(a)(i)2 marksSuggest how heat energy is transferred from the sun to the tools.
28. 3(a)(ii)2 marksExplain why the wooden handle of the hammer and the nail reached different temperatures.
29. 3(a)(iii)4 marksExplain how the nervous system causes the carpenter to automatically drop the hot nail upon picking it up.
30. 3(a)(iv)1 markName the process by which heat is transferred from the hot nail to the carpenter's hand.
31. 3(a)(v)1 markExplain how wearing a glove made of thick cloth prevents the carpenter's hand from being burned by a hot nail.
32. 3(b)(i)1 markDefine what is meant by convection in relation to heat transfer.
33. 3(b)(ii)1 markIndicate the most likely direction of airflow by drawing arrows at positions A and B on Figure 4.
34. 3(b)(iii)3 marksExplain why the air circulates in the direction indicated in Figure 4.
35. 4(a)(i)2 marksChoose TWO very good electrical conductors from the provided list.
36. 4(a)(ii)1 markChoose ONE very good electrical insulator from the provided list.
37. 4(b)(i)1 markCalculate the total voltage of the battery consisting of four dry cells connected in series, if each cell provides 1.5 V.
38. 4(b)(ii)1 markState the reading on the ammeter in Figure 5a when the switch is open.
39. 4(b)(iii)1 markState how the ammeter reading changes when a conducting wire is connected across terminals X and Y with the switch closed.
40. 4(b)(iv)1 markCherise places a 2 ohm resistor between X and Y and closes the switch; the voltmeter across it reads 4 V. State the formula used to calculate current.
41. 4(b)(v)2 marksCalculate the current in the circuit using the values from (iv), stating the correct unit.
42. 4(b)(vi)1 markGive ONE reason why it is beneficial to include a fuse in this circuit.
43. 4(c)(i)1 markState ONE precaution to prevent electrical shock or fire when connecting the radio to an outlet.
44. 4(c)(ii)1 markState a SECOND precaution to prevent electrical shock or fire when connecting the radio to an outlet.
45. 4(d)1 markIdentify the most appropriate type of fire extinguisher for extinguishing an electrical fire.
46. 4(e)(i)1 markName ONE item of protective clothing/gear worn by fire fighters.
47. 4(e)(ii)1 markName a SECOND item of protective clothing/gear worn by fire fighters.
48. 5(a)3 marksName the eye structures labelled A, B, and C in Figure 6a.
49. 5(b)2 marksState the functions of the structures labelled A and B in Figure 6a.
50. 5(c)(i)5 marksExplain how Fred's breathing rate and heart rate change as he runs up the slope.
51. 5(c)(ii)5 marksIdentify TWO sense organs that enable Fred to run up the slope, and explain how each organ assists him.
52. 6(a)(i)2 marksDescribe and compare the reaction of aluminium with dilute sulphuric acid.
53. 6(a)(ii)2 marksDescribe and compare the reaction of iron with dilute sulphuric acid.
54. 6(a)(iii)1 markDescribe and compare the reaction of copper with dilute sulphuric acid.
55. 6(b)4 marksSuggest TWO safety precautions to follow when reacting aluminium with sulphuric acid, providing a reason for each precaution.
56. 6(c)2 marksExplain why it is dangerous to react sodium and potassium with dilute sulphuric acid.
57. 6(d)4 marksExplain why the contractor advised painting the iron windows as soon as possible.