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

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.

Identify which light bulb is more efficient AND clearly explain how the experimental results in Table 2 allow you to reach your conclusion.

This question uses a figure or table from the paper — you'll see it when you practise.