CSEC Integrated Science · 2008 · Paper 2

54 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)2 marksSequence the individuals in order of the energy required by their bodies when performing the activity for the same duration, from most energy required to least energy required.
2. 1(b)1 markIdentify which activity in Figure 1 would result in the individual having the highest breathing rate.
3. 1(c)6 marksDescribe the breathing rate and chest movement expected during the activity for Samantha, Susan, and Sharon, referring to structures of the respiratory system.
4. 1(d)(i)1 markState ONE difference between aerobic and anaerobic respiration.
5. 1(d)(ii)1 markState in which activity in Figure 1 anaerobic respiration plays a significant role.
6. 1(d)(iii)1 markExplain why anaerobic respiration might be necessary for this activity.
7. 1(d)(iv)2 marksComplete Table 1 by stating TWO likely differences between the air inhaled and exhaled by Susan during her activity.
8. 1(e)1 markWith reference to Susan's activity, give a reason for ONE difference between inhaled and exhaled air.
9. 2(a)4 marksComplete Table 2 by classifying each machine as a pulley, lever, or inclined plane, and state how each makes work easier.
10. 2(b)(i)a)1 markIdentify which lever shown in Figure 2 is a second-order lever.
11. 2(b)(i)b)1 markIdentify which lever shown in Figure 2 is a third-order lever.
12. 2(b)(ii)1 markLabel lever D in Figure 2 to indicate the positions of the fulcrum (F), effort (E), and load (L).
13. 2(c)(i)1 markFrom Figure 3, estimate the mechanical advantage for a load of 5 N.
14. 2(c)(ii)2 marksCalculate the effort applied for a load of 5 N using the mechanical advantage from Figure 3.
15. 2(c)(iii)2 marksDescribe the trend shown by the graph in Figure 3.
16. 2(c)(iv)1 markSuggest a reason for the trend observed in Figure 3.
17. 2(d)(i)1 markSuggest the physical effect on the scissors of leaving them by the sink.
18. 2(d)(ii)1 markSuggest the effect on the function of the scissors.
19. 3(a)1 markIdentify what natural disaster could have caused this.
20. 3(b)2 marksDefine what lava is.
21. 3(c)2 marksSuggest TWO possible reasons why many persons migrated from the area where the lava was emitted.
22. 3(d)2 marksState TWO precautions that residents living nearby may adopt to protect themselves.
23. 3(e)2 marksMeteorologists reported that dust in surrounding islands originated from the nearby natural disaster. Describe how this occurred.
24. 3(f)2 marksSuggest TWO ways in which the volcanic eruption can provide economic benefits to the country in the long term.
25. 3(g)2 marksList TWO other natural disasters that have affected the Caribbean region.
26. 3(h)2 marksList TWO features or environmental impacts of ONE of the natural disasters listed in (g).
27. 4(a)(i)2 marksDescribe the role of the brain in assisting Jerry to successfully jump from Levels 1 to 7.
28. 4(a)(ii)2 marksDescribe the role of the eyes in assisting Jerry to jump through the hop-scotch levels.
29. 4(a)(iii)2 marksDescribe the role of muscles in assisting Jerry to jump through the hop-scotch course.
30. 4(a)(iv)2 marksDescribe the role of the semi-circular canals in assisting Jerry during the game.
31. 4(b)(i)1 markState at which level(s) of the game Jerry is likely to be MOST stable.
32. 4(b)(ii)1 markGive a reason for the answer in (b)(i).
33. 4(c)(i)1 markJerry heard barking dogs and ran rapidly away from the game. State which hormone was likely to have enabled this fight-or-flight response.
34. 4(c)(ii)2 marksDescribe TWO physiological effects of adrenaline on Jerry's body.
35. 4(d)(i)1 markState which hormone will promote the development of facial hair as Jerry matures.
36. 4(d)(ii)1 markState which hormone is necessary to control the amount of glucose in Jerry's blood.
37. 5(a)2 marksDraw a food chain showing the feeding relationships among all of the identified organisms.
38. 5(b)1 markIdentify which of the organisms are producers.
39. 5(c)2 marksIf toxic chemicals killed the small animals and larvae in the river, state TWO effects this would have on the other organisms.
40. 5(d)2 marksState TWO methods that villagers can use to catch fish in the river.
41. 5(e)(i)1 markState whether the same method of fishing used in the river could be used by deep sea fishermen.
42. 5(e)(ii)2 marksProvide TWO reasons for the response in (e)(i).
43. 5(f)(i)1 markJohn placed two live small fish in a sealed bottle. State what will happen to the fish after a while.
44. 5(f)(ii)1 markSuggest a reason for what happens to the fish in the sealed bottle.
45. 5(g)3 marksDescribe how the sun can be used to purify polluted river water for domestic use.
46. 6(a)(i)1 markIn relation to playing surfaces, define 'friction'.
47. 6(a)(ii)1 markIn relation to playing surfaces, define 'bounce'.
48. 6(b)(i)1 markFrom Figure 5, determine which surface (A, B, C, or D) is the HARDEST.
49. 6(b)(ii)2 marksGive a reason for identifying that surface as the hardest.
50. 6(b)(iii)1 markDetermine which surface (A, B, C, or D) is the SMOOTHEST.
51. 6(b)(iv)2 marksState a reason for your answer in (b)(iii).
52. 6(b)(v)1 markThe surfaces are made of wood, concrete, rubber, and grass. Identify which surface is most likely rubber.
53. 6(b)(vi)2 marksProvide a reason for selecting that surface as rubber.
54. 6(c)4 marksComplete Table 3 by filling in the name of the shoe part that prevents skid, its suitable material, and the function and suitable material for the midsole.