Cxc Integrated Science Paper free essay sample

Light energy is converted to another type of energy when green plants make food, (i) What kind of energy is stored in this food? 1;Li (ii) 4-__ (imark) What substance is combined with carbon dioxide during photosynthesis? dthc (b) mar) Describe bow plants and animals may become fossil fuels. Z___iL â‚ ¬Jrr iW. Ld urthr — (c) Country X is a flat, tropical island, The electricity generating company in Country X uses a petroleumbased fuel. Name TWO alternative sources of energy that can be used for electricity generation in this country. (i) (1 mark) (ii) 1 mark) (d) For EACH alternative source named in (c) above, gie ONE disadvantage which may cause the electricity generating company to resist using the alternative source of energy dcntified I ua - (1 mark) urtcin 4 jQ-LtIL 7/1/LI (e) Recently, many used (pre-owned) vehicles have been imported from Japan and the United States into the Caribbean. This has resulted in an increase in the number of vehicles on the roads and increased amounts of carbon dioxide in the air. (i) Name TWO other pollutants which are being added to the atmosphere because of the increase in the number of vehicles. w pitd. (ii) ether ftcu-t !tL_j-A1r .uwIuuii. ,ri-Gn flW1L (2 marks) 4LcvLA1 State ONE negative effect of ONE of the pollutants named in (e) (i) above, on the environment. iihhtuU d1LLt1 At I 11H1 L1U1 UCLftfl 4 j-t (I (1 mark) (iii) Suggest TWO negative effects of increased levels of carbon dioxide on the Caribbean environment. 1)tL wJ fl- ;th(? ,1t-ubatcL ktL jwkAtUl t 11t cfttk. U (U5W jt . urnkrit (2 marks) iUi4L (iv) What are TWO possible effects of increased levels of air pollution on the health of Caribbean people? (i. Tflx4k.. r oxUt wtItT ai arv ict 9 ,tanar marks) LLUit jitt ctuu4 1 k:) tPiI )Li i.. j_JL)4 -’ (0 There have been serious concerns about the build-up of carbon dioxide in the atmosphere in recent years. Table 1 provides data about carbon dioxide emissions by China and the United States. TABLE 1: AMOUNT OF CARBON DIOXII)E EMITTED BY CHI NA AND TI{E UNITED STATES FROM 1968 TO 2008 Carbon Dioxide Emission (in billion tonnes) by Year 1968 1973 1. 1 5. 2 1978 1. 5 5. 3 1983 1. 6 4. 8 1988 2. 4 5,4 1993 2. 9 5. 7 1998 3. 3 6. 2 2003 4. 3 6. 4 2008 6. 6. 4 China USA 0. 7 4. 3 (Data modified from BPp,lc. ) (i) Figure 1 on page 5 shows the data for USA. On the same grid, using the scales provided, plot a graph to represent the data for China. (5 marks) Label the axes on the graph. State an appropriate title for the graph, (1 mark) (ii) (iii) hiun th Ojpc cnu ef i1i,fl doxde n*e (1 mark) (iv) During which period was there a DECREASE in the amount of carbon dioxide emitted by the USA? (lmark) (v) In which year did China emit the same amount of carbon dioxide as the United States? n. (vi) ‘ 1 mark) Based on the trends in the graphs. which country would produce more carbon dioxide in 2010? (1 mark) Total 25 marks 01230020/F 2011 Carho,i /Di)i)/5J p z ‘-I ii 2 SECTION A Answer ALL FOUR questions. I. (a) Light energy is converted to another type of energy when green plants make food. (i) What kind of energy is stored in this food? ( 9 I\ ,1 . (ii) What substance is combined with carbon dioxide during photosynthesis? (1 mark) (b) Describe how plants and animals may become fossil fuels. Qj ‘t JJjJ (2 marks) (c) Country X i s a flat, tropical island. The electricity generating company in Country X uses a petroleum-based fuel. Name TWO alternative sources of energy that can be used for electricity generation in this country. (i) (1 mark) (ii) (1 mark) (d) For EACH alternative source named in (c) above, give ONE disadvantage which may cause the electricity generating company to re 1st using the alternative sour e of en rgy identif ed (1) (ii) )/ 11/-cJ 4 5i / (Imark) GO uN iO HE NEXI PAGE -3- (e) Recently, many used (pre-owned) vehicles have been imported from Japan an the United States into the Caribbean. This has resulted in an increase in the number of vehici s on the roads and increased amounts of carbon dioxide in the air. (i) Name TWO other pollutants which are being added to the atmosphere because of the increase in the number of vehicles. (2 marks) (ii) State ONE negative effect of ONE of the pollutants named in (e) (i) above, on the environment. (1 mark) (iii) Suggest TWO negative effects of increased levels of carbon dioxide on the Caribbean environment. 11/ %4 0 h 4 d 7AtJ1 (iv) What are TWO possible effects of increased levels of air pollution on the health of Caribbean people? 2 marks) ____ _ (f) There have been serious concerns about the build-up of carbon dioxide in the atmosphere in recent years. Table 1 provides data about carbon dioxide emissions by China and the United States. TABLE 1: AMOUNT OF CARBON DIOXIDE EMITTED BY CHINA AND THE UNITED STATES FROM 1968 TO 2008 Carbon Dioxide Emission (in billion tonnes) by Year 1968 1973 1978 1. 5 5. 3 1983 1. 6 1988 1993 1998 2003 2008 China USA 0. 7 4. 3 1. 1 5. 2 2. 4 5. 4 2. 9 5. 7 3. 3 6. 2 4. 3 6. 4 6. 9 6. 4 4. 8 (Data modfiedfrom BPp. Lc. ) (i) Figure 1 on page 5 shows the data for USA. On the same grid, using the scales provided, plot a graph to represent the data for China. (5 marks) Label the axes on the graph. State an appropriate title for the graph. bittitA w4Lk (A4 (ii) (iii) (1 mark) k\4 ed ii,’vt Iii,A t9* ct (1 mark) (iv) During which period was there a DECREASE in the amount of carbon dioxide emitted by the USA? (v) In which year did China emit the same amount of carbon dioxide as the United States? 7a7 (1 mark) (vi) Based on the trends in the graphs. which country would produce more carbon dinde in 2010? 1 mark) Total 25 marks 01230020’Y 2011 U C C H t4 C C C C C C C C C C -4 -4 ‘C C C 00 -4 ‘0 cc -4 a 1 -4 -a cc ‘C n Lb -t C -4 cr z 00 cc ‘C C a a B -4 CM cc ‘C ‘C c_c C ccl I’ C C 00 2’ C’ 2’ a’ -4 cc C ccc \ SECTION A Answer ALL FOUR questions. 1. (a) Light energy is converted to another type of energy when green plants make food, (i) What kind of energy is stored in t his food? c (1 mark) (ii) What substance is combined with carbon dioxide during photosynthesis? (1 mark) (b) Describe how plants and animals may become fossil fuels. ciY\- cLid ix rnLA I ,Lt -*l ( p j fy-ez Lo (2 marks) (c) Country X is a flat, tropical island. The electricity generating company in Country X uses a petroleum-based fuel. Name TWO alternative sources of energy that can be used for electricity generation in this country. (i) (1 mark) (ii) (1 mark) (d) For EACH alternative source named in (c above, give ONE disadvantage which ma cause the electricity generating company to resist using the alternative source of energy identified. (i) j -utL Ii (1 mark) a _rr ,hci J. (1 vi rk) (e) Recently, many used (preowned) vehicles have been imported from Japan and the United States into the Caribbean. This has resulted in an increase in the number of vehicles on the roads and increased amounts of carbon dioxide in the air. (i) Name TWO other pollutants which are being added to the atmosphere because of the increase in the number of vehicles. (ii) State ONE negative effect of ONE of the pollutants named in (e) (i) above, on the environment, Xc (iii) ,-,-. cccL ci- ,44o ZTZEE (1 mark) Suggest TWO negative effects of increased levels of carbon dioxide on the Caribbean environment. Lccci (iv) L What are TWO possible effects of increased levels of air pollution on the health of Caribbean people? (2 marks) (f) There have been serious concerns about the bui1dup of carbon dioxide in the atmosphere in recent years. Table 1 provides data about carbon dioxide emissions by China and the United States. TABLE 1: AMOUNT OF CARBON DIOXIDE EMITTED BY CifiNA AND THE UNITED STATES FROM 196 8 TO 2008 Carbon Dioxide Emission (in biffion tonnes) by Year 1968 1973 1. 1 1978 1. 5 1983 1. 6 1988 1993 2. 9 1998 2003 2008 China USA 0. 7 4. 3 2. 4 5. 4 3. 6. 2 4,3 6. 4 6. 9 6. 4 5. 2 5. 3 4. 8 5. 7 (Data modified from BFp. l. c. ) (i) Figure 1 on page 5 shows the data for USA. On the same grid, using the scales provided, plot a graph to represent the data for China. (5 marks) Label the axes on the graph. State an appropriate title for the graph. (1 mark) (ii) (iii) Q (iv) .r.. ’.. o. ii W’Jt 4 c. , tq. . cri mark) During which period was there a DECREASE in the amount of carbon dioxide emitted by the USA? (1 mark) (v) In which year did China emit the same amount of carbon dioxide as the United States? imark) (vi) Based on the trends in the graphs. which country would produce more carbon dioxide in 2010? (1 mark) Total 25 marks 10. 0 :t eZO 9. 0 8. 0 7. 0 6. 0 5. 0 4. 0 3. 0 2. 0 0. 0 1958 1968 1978 e x 1988 S 1998 2008 2013 arboi i nus ( )N TO T FXI Integrated Science Paper 02—June2011 Comments Question 1: Exemplar 1. 2 and 3 Part (a) These candidates were awarded full marks for this part of the question because the candidates clearly stated the type of energy present as required in (i) and correctly named the substance which combines with carbon dioxide uring photosynthesis. These candidates were awarded full marks for this part of the question because the candidates were able to use appropriate scientific terminology and to provide adequate detail to completely answer the question. In addition, the responses were clear. These candidates were awarded full marks for this part because the candidates correctly named the alternative sources of energy. These candidates were awarded full marks for this part because the candidates were able to clearly state appropriate disadvantages of the named alternative sources of energy. These candidates were awarded full marks for this part because the candidates had a comprehensive grasp of pollution, pollutants and their negative impact as required by the syllabus. These candidates were awarded full marks for this part as the candidates clean v demonstrated the ability to construct, label and analyze graphs For sections (i) to (iii) the points were plotted correctly and smooth lines drawn throuch them. the axes were labelled correctly and an appropriate title stated: for sections (iv) to (vi), the candidates were able to correctly extract information from the graph. Part (b) Part (c) Part (d) Part (e) Part (t