CSEC Integrated Science · 2007 · Paper 2

52 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)5 marksPlot TWO graphs on the grid provided in Figure 1 to compare the increase in height of the two bean plants over the twelve-week period.
2. 1(a)(ii)1 markWrite an appropriate title above your graph in Figure 1.
3. 1(b)(i)1 markState after how many weeks Plant B stopped increasing in height.
4. 1(b)(ii)1 markState which of the two plants shows the faster rate of growth.
5. 1(b)(iii)2 marksState TWO conditions that might cause the faster rate of growth in the chosen plant.
6. 1(b)(iv)1 markExplain how ONE of the conditions mentioned would cause an increase in the rate of growth.
7. 1(c)(i)2 marksLabel Parts A and B on Figure 2.
8. 1(c)(ii)2 marksUsing the ruler on the left side of Figure 2, measure and record the length of the stem.
9. 2(a)2 marksName TWO water-safety devices that make it easier for a person to float in the sea or pool.
10. 2(b)(i)1 markIdentify in which picture, A or B, the learner is floating in sea water.
11. 2(b)(ii)1 markGive ONE reason for your answer.
12. 2(c)1 markDefine what is meant by 'aerobic' in the context of swimming.
13. 2(d)(i)1 markName ONE other technique used for performance enhancement.
14. 2(d)(ii)2 marksExplain how ANY ONE of the performance enhancement techniques could increase the performance of the swimmers.
15. 2(d)(iii)1 markState why performance enhancement techniques are considered to be unethical.
16. 2(d)(iv)2 marksSuggest TWO ways in which swimmers can improve their performance without using unethical techniques.
17. 2(d)(v)1 markName ONE food nutrient which should be part of the swimmer's diet.
18. 2(d)(vi)1 markGive ONE reason for your nutrient choice.
19. 2(e)2 marksExplain why swimmers are advised not to eat a heavy meal before a race.
20. 3(a)(i)1 markDefine what is meant by a 'hormone'.
21. 3(a)(ii)2 marksGive TWO examples of hormones.
22. 3(b)(i)6 marksFor EACH patient, state the malfunctioning secretory/endocrine organ and explain why the symptom is experienced.
23. 3(b)(ii)1 markSuggest which food nutrient Joseph must decrease to control his symptoms.
24. 3(c)(i)1 markDefine what is meant by a 'reflex action'.
25. 3(c)(ii)1 markIdentify in which picture, A or B, a reflex action is MOST likely occurring.
26. 3(c)(iii)2 marksGive ONE reason for your choice.
27. 3(c)(iv)1 markName the sense organ being used in the response at B in Figure 4.
28. 4(a)4 marksState TWO chemical and TWO physical properties of water.
29. 4(b)(i)2 marksName TWO processes used by a local water company to purify water for domestic use.
30. 4(b)(ii)2 marksExplain how EACH process helps to purify the water.
31. 4(c)(i)2 marksUse FOUR of the organisms shown in Figure 5 to draw a food chain.
32. 4(c)(ii)1 markIdentify ONE activity on the farm shown in Figure 5 that could have a negative effect on the river.
33. 4(c)(iii)1 markExplain how this farm activity results in the negative effect.
34. 4(c)(iv)1 markIdentify ONE activity of the factory shown in Figure 5 that could have a negative effect on the river.
35. 4(c)(v)1 markExplain how this factory activity results in the negative effect.
36. 4(d)1 markExplain why the dead fish should NOT be collected and sold.
37. 5(a)2 marksIn the frame provided in Figure 6, draw what the bimetallic strip would look like when heated. Label A and B on your diagram.
38. 5(b)(i)1 markDefine what a 'thermostat' is.
39. 5(b)(ii)4 marksComplete Table 2 by writing the effect of EACH action indicated on the flow of electric current through the iron.
40. 5(c)(i)1 markSuggest the method of heat transfer from the hot iron to the metal rest on the ironing board.
41. 5(c)(ii)1 markSuggest the method of heat transfer from the hot iron to an unlit candle wax placed near but not touching it.
42. 5(d)2 marksExplain what is meant by 'ventilation'.
43. 5(e)(i)3 marksComplete Table 3 to show the specific cause of EACH observed effect of poor ventilation.
44. 5(e)(ii)1 markState ONE way in which the ventilation in the room might be improved.
45. 6(a)1 markDefine what a 'force' is.
46. 6(b)(i)1 markDefine 'gravitational force'.
47. 6(b)(ii)1 markDefine 'frictional force'.
48. 6(c)(i)4 marksExplain how the student might use the pieces of apparatus as set up in Figure 8 to find the mass of the mango.
49. 6(c)(ii)2 marksExplain how the student could use the results obtained to calculate the mass of the mango.
50. 6(d)1 markDefine what a 'machine' is.
51. 6(e)(i)3 marksLabel Figure 9 to show the effort force (E), the fulcrum (F), and the load (L).
52. 6(e)(ii)2 marksExplain why the bottle opener, used as shown in Figure 9, is considered to be a machine.