2011 Cxc Integrated Science Paper 2

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SECTION A

Answer ALL FOUR questions.
(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?

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(ii)

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What substance is combined with carbon dioxide during photosynthesis?

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(b)

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Describe bow plants and animals may become fossil fuels.

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(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

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(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.

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State ONE negative effect of ONE of the pollutants named in (e) (i) above, on the environment. iihhtuU

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(iii)

Suggest TWO negative effects of increased levels of carbon dioxide on the Caribbean environment. 1)tL

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(iv) What are TWO possible effects of increased levels of air pollution on the health of Caribbean people? (i.

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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 CHINA 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 6.9 6.4

China USA

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(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)

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(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?

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(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

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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?
(

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.

(ii)

What substance is combined with carbon dioxide during photosynthesis?

(1 mark)
(b) Describe how plants and animals may become fossil fuels. Qj ‘t

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(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 may cause the...
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