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3 marksElectricity Generation, Demand, and Management

CAPE Environmental Science Unit 2 · 2013 · Paper 2 · Question 4(a)(ii)

A student investigates whether fluorescent light bulbs are more energy efficient than incandescent bulbs using the experimental setup shown in Figure 5. Table 2 displays the recorded data.

State THREE precautions the student will have to take to get the most accurate results.

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Other parts of this question

  1. 4(a)(i)Outline THREE steps the student will have to take to conduct this experiment.[3 marks]
  2. 4(a)(iii)Identify which light bulb is more efficient AND clearly explain how the experimental results in Table 2 allow you to reach your conclusion.[5 marks]
  3. 4(b)(i)List THREE costs, other than generating and environmental costs, that could be included in the 'other costs' category.[3 marks]
  4. 4(b)(ii)Explain why TWO of the costs listed in Part (b)(i) should be included in any discussion of the overall cost of using natural gas to produce electricity.[6 marks]

More practice: the rest of this paper · more Electricity Generation, Demand, and Management questions · all CAPE Environmental Science Unit 2 past papers