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4 marksNature, Forms, and Sources of Energy

CAPE Environmental Science Unit 2 · 2017 · Paper 2 · Question 4(c)(ii)

A Caribbean family consumes 7 200 MJ of energy per year on household lighting using incandescent light bulbs. Only 432 MJ of the energy used is actually converted into light. Calculate the efficiency of conversion of these light bulbs and suggest TWO ways in which the family could improve its energy usage for household lighting.

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  1. 4(a)Electricity is described as a secondary energy source. State ONE primary energy source and distinguish between 'primary' and 'secondary' sources of energy.[3 marks]
  2. 4(b)At a conference, a speaker states that "the world's socioeconomic dependency on fossil fuel combustion will make it difficult to reduce carbon dioxide…[3 marks]
  3. 4(c)(i)Define the term 'efficiency of conversion' as it refers to energy.[2 marks]
  4. 4(d)(i)What was the price of gasoline in 2000?[1 mark]
  5. 4(d)(ii)Describe the OVERALL trend illustrated in the graph.[3 marks]
  6. 4(d)(iii)The government of this Caribbean country is considering encouraging the use of electric vehicles as a means of reducing energy spending. Some opponents of the…[4 marks]

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