CSEC Integrated Science · May/June 2013 · 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)2 marksDescribe how Ricki's chest (intercostal) muscles and ribcage operate to cause inhalation and exhalation of air.
2. 1(a)(ii)1 markSuggest how his breathing rate changes as he runs up the hill.
3. 1(a)(iii)1 markGive a reason for the suggested change in breathing rate while running uphill.
4. 1(a)(iv)3 marksExplain how the movement of Ricki's diaphragm allows him to breathe in when singing or engaging in strenuous activity.
5. 1(b)(i)1 markState ONE difference between the air that Ricki inhales and the air that he exhales.
6. 1(b)(ii)1 markState a second difference between the air that Ricki inhales and the air that he exhales.
7. 1(c)(i)1 markState the term used to describe this type of respiration.
8. 1(c)(ii)2 marksWrite a word equation for the process of respiration that involves oxygen.
9. 1(c)(iii)1 markName ONE nutrient Ricki can use to provide sufficient energy for his exercise.
10. 1(d)(i)5 marksUsing Figure 1 on page 5, which shows data for non-smokers, plot a graph to represent the data for tobacco smokers from Table 1.
11. 1(d)(ii)2 marksLabel the axes on the graph in Figure 1.
12. 1(d)(iii)1 markState an appropriate title for the graph.
13. 1(d)(iv)1 markAccording to the trends in the graphs, at what age did the SAME number of smokers and non-smokers die?
14. 1(d)(v)1 markFrom the graph, determine the age at which 250 non-smokers will die.
15. 1(d)(vi)1 markBased on the trends shown in the graphs, state what can be concluded about the effect of smoking tobacco on life expectancy.
16. 1(d)(vii)1 markState ONE likely difference between the lungs of smokers and the lungs of non-smokers.
17. 2(a)2 marksDistinguish between corrosion and rusting.
18. 2(b)(i)1 markIn which boiling tube will the nail show the MOST rust after one month?
19. 2(b)(ii)2 marksExplain your answer in (b)(i).
20. 2(b)(iii)1 markState the purpose of the anhydrous calcium chloride in Boiling Tube A.
21. 2(b)(iv)1 markIdentify which boiling tube is set up as a control.
22. 2(b)(v)2 marksState whether rusting would occur if stainless steel nails are used instead of iron nails, and give a reason.
23. 2(b)(vi)1 markBased on your answer in (b)(v), suggest ONE use of stainless steel in the home.
24. 2(b)(vii)1 markState ONE method that can be used to prevent rusting.
25. 2(c)4 marksOutline TWO advantages and TWO disadvantages of using plastic taps instead of brass taps.
26. 3(a)(i)3 marksLabel the parts X, Y and Z on Figure 3.
27. 3(a)(ii)2 marksState TWO structures present in the male human reproductive system that are not present in females.
28. 3(b)3 marksExplain how this plant may be reproduced by: - Asexual reproduction - Sexual reproduction
29. 3(c)2 marksSuggest TWO ways by which governments or individuals can overcome the problem of overpopulation in developing countries.
30. 3(d)(i)1 markState which seedling, A or B, has the HIGHEST growth rate.
31. 3(d)(ii)1 markWhat is the maximum height reached by Seedling A?
32. 3(d)(iii)1 markWhat is the maximum height reached by Seedling B?
33. 3(d)(iv)2 marksGive TWO possible reasons for the difference in the maximum height reached by Seedlings A and B.
34. 4(a)(i)3 marksDistinguish among conduction, convection and radiation of heat energy.
35. 4(a)(ii)2 marksGive ONE example of a conductor and ONE example of an insulator.
36. 4(b)(i)1 markIdentify the method of heat transfer from the outside of the pot to the inside of the pot.
37. 4(b)(ii)1 markIdentify the method of heat transfer from the bottom of the water to the top of the water.
38. 4(c)(i)1 markSuggest an aim for this experiment.
39. 4(c)(ii)1 markState which rod is the BEST conductor.
40. 4(c)(iii)1 markState which rod is the BEST insulator.
41. 4(c)(iv)2 marksList TWO variables that must be held constant in this experiment.
42. 4(c)(v)1 markExplain why the water is constantly heated throughout the experiment instead of placing the rods in boiling water without a flame.
43. 4(d)2 marksWorkers find the warehouse in Figure 8B much cooler than in Figure 8A. Give a scientific explanation for this observation.
44. 5(a)3 marksState THREE differences between the transport of nutrients in plants and the transport of nutrients in humans.
45. 5(b)4 marksExplain how Chandra's circulatory and respiratory systems function together to enable her daily rides.
46. 5(c)4 marksDescribe the functioning of the nervous system in enabling Chandra to perform her daily rides.
47. 5(d)4 marksIdentify TWO materials suitable for making a bicycle frame and state the property of EACH material that makes it suitable.
48. 6(a)3 marksName the THREE primary colours of light in the rainbow.
49. 6(b)3 marksDescribe how Anna could create secondary colours with spotlights on a white wall.
50. 6(c)(i)4 marksCalculate the current in the extension cord when the 60 W bulb is turned on at 120 V.
51. 6(c)(ii)2 marksA washing machine rated at 360 W, 120 V, and 3 A is plugged into the same extension cord. Explain the safety of this action by identifying TWO possible hazards from electrical circuits.
52. 6(c)(iii)3 marksWhen a blow dryer and clothes iron are plugged into the same socket causing an overload, identify the device in the house that prevents wiring from burning and describe how it works.