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4 marksElectricity Generation, Demand, and Management

CAPE Environmental Science Unit 2 · 2015 · Paper 2 · Question 3(b)(ii)

A Caribbean family consumes 7 200 MJ of energy per year on household lighting using incandescent bulbs, of which only 432 MJ is converted into light. State the efficiency of conversion of these bulbs AND state TWO measures the family can take to improve energy usage for household lighting.

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  1. 3(a)Explain the statement: "the world's socioeconomic dependency on fossil fuel combustion will make it difficult to reduce carbon dioxide emissions".[3 marks]
  2. 3(b)(i)Define the term 'efficiency of conversion' as it refers to energy.[2 marks]
  3. 3(c)(i)Given that total world production of biofuel in 2011 was 1 810 000 barrels per day, calculate how much more biofuel was produced in North, Central, and South…[5 marks]
  4. 3(c)(ii)In 2011, total world petroleum production was 87 331 600 barrels per day compared to 1 810 000 barrels per day of biofuel. Discuss TWO different reasons that…[6 marks]

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