CSEC Integrated Science · May/June 2015 · 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)1 markGive ONE reason why the ponds on the hillside dry up slower than those on the flat fields.
2. 1(a)(ii)2 marksState TWO possible effects on the farm of cutting down the forest on the hillside.
3. 1(a)(iii)4 marksUse the data from Table 1 to complete the food web in Figure 1 by drawing a MAXIMUM of 14 arrows in the appropriate places.
4. 1(a)(iv)3 marksName ONE herbivore, ONE carnivore and ONE omnivore in Table 1.
5. 1(b)(i)1 markName the process used by living things to obtain energy.
6. 1(b)(ii)1 markName the process by which plants make food.
7. 1(b)(iii)2 marksWrite a word equation for the process by which plants make food.
8. 1(b)(iv)1 markName ONE form in which plants use nitrogen present in the soil.
9. 1(c)(i)4 marksOn the grid in Figure 2 on page 5, using the scales provided, plot a graph to represent the data in Table 2.
10. 1(c)(ii)2 marksDraw on the graph the best straight line to show the trend.
11. 1(c)(iii)1 markLabel the axes on the graph.
12. 1(c)(iv)1 markSuggest an appropriate title for the graph.
13. 1(c)(v)1 markIf corn grows best in a neutral pH, use the graph to determine which is the most suitable field to be used as a corn field.
14. 1(c)(vi)1 markUse the graph to determine which field would be best for growing citrus plants which flourish in acidic soils.
15. 2(a)2 marksDistinguish between 'excretion' and 'egestion'.
16. 2(b)(i)4 marksIdentify the structures labelled A, B, C and D in Figure 3.
17. 2(b)(ii)1 markState the function of the part labelled D in Figure 3.
18. 2(c)(i)1 markIdentify ONE excretory product that is likely to be present in the atmosphere of Mr Boodoo's backyard.
19. 2(c)(ii)1 markIdentify ONE excretory product that is likely to be present in the soil of Mr Boodoo's backyard.
20. 2(c)(iii)2 marksState ONE disadvantage and ONE advantage of the excretory product named in (ii) above.
21. 2(c)(iv)4 marksExplain how the water from the stream may be made safe for drinking.
22. 3(a)(i)1 markDefine the term 'force'.
23. 3(a)(ii)2 marksState TWO effects of a force on a body.
24. 3(a)(iii)1 markWhat is the unit of force?
25. 3(b)1 markFriction is an example of a force. Explain what is meant by a 'frictional force'.
26. 3(c)(i)1 markState ONE variable that is held constant during the experiment.
27. 3(c)(ii)2 marksExplain why the car was able to travel further when the axle was oiled.
28. 3(c)(iii)2 marksFrom the experiment on page 9, state ONE advantage of friction and ONE disadvantage of friction.
29. 3(d)(i)1 markExplain the effect of changing the car tyres on the centre of gravity of the body of the car.
30. 3(d)(ii)1 markExplain the effect of changing the car tyres on the stability of the body of the car.
31. 3(e)(i)2 marksExplain the role of the endocrine system as he performed this activity.
32. 3(e)(ii)1 markName ONE system in the body, other than the endocrine system, that plays an important role in the situation in (e)(i).
33. 4(a)(i)1 markWhat is a microorganism?
34. 4(a)(ii)1 markState ONE way by which the growth of mould on bread may be reduced.
35. 4(b)(i)1 markName ONE microorganism that is used to make bread in the commercial industry.
36. 4(b)(ii)3 marksUsing the observations in the experiment, determine THREE conditions that are necessary for mould growth.
37. 4(b)(iii)2 marksWhat is the effect of refrigeration on mould growth?
38. 4(b)(iv)2 marksState whether there will be any mould growth if Terrance conducts the experiment in a vacuum (no air). Explain your answer.
39. 4(c)1 markExplain why it is not advisable for Terrance to eat bread that has mould growing on it.
40. 4(d)2 marksName TWO methods that can be used to preserve foods.
41. 4(e)2 marksBread is baked at temperatures that do not support mould growth. Explain why mould is MOST likely to grow on bread when it is exposed to the atmosphere.
42. 5(a)3 marksMr Brown consumes a large quantity of ground provisions (yam, dasheen, potato) in his diet. Discuss the importance of this food choice to Mr Brown's work and weekend activity.
43. 5(b)6 marksName THREE Caribbean food groups that should be included in Mr Brown's diet and explain the importance of these food groups.
44. 5(c)6 marksIdentify FOUR machines (tools) that are made of metals and discuss ONE factor that may reduce the efficiency of these machines (tools).
45. 6(a)5 marksExplain how petroleum and coal are formed.
46. 6(b)4 marksDescribe TWO advantages and TWO disadvantages of using solar energy to charge batteries in an electric car.
47. 6(c)2 marksOutline TWO negative effects on the local environment if the family uses a gasoline powered car.
48. 6(d)4 marksState TWO alternative sources of energy, other than solar energy, that are easily available to Keshorn's father in the Caribbean and explain why these sources are considered readily available.