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1 markFossil Fuels and Alternative Energy Sources

CSEC Integrated Science · May/June 2014 · Paper 2 · Question 1(d)(v)

Data showing dissolved carbon dioxide in oceans from 1850 to 2000 is presented to the community.

Use the trend shown in the graph to predict the level of dissolved carbon dioxide in the ocean in 2025.

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Other parts of this question

  1. 1(a)(i)Identify the processes represented by arrows A, B and C in Figure 1.[3 marks]
  2. 1(a)(ii)State TWO uses of water for Amelia other than drinking.[2 marks]
  3. 1(a)(iii)Suggest ONE reason why Amelia's cousin became very sick after drinking untreated river water.[1 mark]
  4. 1(a)(iv)Name TWO methods Amelia's community can use to treat the river water to make it suitable for drinking.[2 marks]
  5. 1(b)(i)State ONE effect that cutting down the forest will have on the water cycle.[1 mark]
  6. 1(b)(ii)The logging company plans to replant with trees poisonous to local herbivores. State ONE way this would affect the forest food webs.[1 mark]
  7. 1(c)(i)State ONE benefit to the environment of using hydroelectric power.[1 mark]
  8. 1(c)(ii)Identify ONE negative effect on the local environment of building the dam.[1 mark]
  9. 1(c)(iii)State ONE way the large lake (dam) may affect the water cycle.[1 mark]
  10. 1(c)(iv)Name ONE suitable material for making uninsulated electrical lines used to transmit high voltage electricity efficiently over long distances.[1 mark]
  11. 1(c)(v)Identify ONE hazard that can result from these electrical transmission lines.[1 mark]
  12. 1(d)(i)Plot the points representing the data in Table 1 on the grid in Figure 2.[4 marks]
  13. 1(d)(ii)Draw the best smooth curve on the graph to show the trend.[2 marks]
  14. 1(d)(iii)Label the axes on the graph.[1 mark]
  15. 1(d)(iv)State an appropriate title for the graph.[1 mark]
  16. 1(d)(vi)Using the trend in the graph, state a conclusion about the level of carbon dioxide in the ocean over the period 1850–2000.[1 mark]

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