2011 Cxc Integrated Science Paper 2

1930 Words May 20th, 2013 8 Pages
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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(imark)

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
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(ii) (iii)

(1 mark)

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(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?

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(1 mark) (vi)

Based on the trends in the graphs. which country would produce more carbon dinde in 2010?

(1 mark) Total 25 marks

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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 this 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. nciY\- cLid

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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

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