A student investigated how different insulating materials affect the energy transfer from bottles of very hot water - AQA - GCSE Physics - Question 5 - 2023 - Paper 1
Question 5
A student investigated how different insulating materials affect the energy transfer from bottles of very hot water.
Figure 6 shows some of the equipment used.
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Worked Solution & Example Answer:A student investigated how different insulating materials affect the energy transfer from bottles of very hot water - AQA - GCSE Physics - Question 5 - 2023 - Paper 1
Step 1
Why did the student use the funnel?
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Answer
The student used the funnel as a safety precaution to avoid spillage of very hot water during the transfer into the bottles. This helps to ensure that the investigation remains safe and that accurate measurements can be taken.
Step 2
Why did the student not use insulation for bottle A?
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The student did not use insulation for bottle A because it serves as the control in the experiment. The control is essential to compare the effects of insulation materials used in the other bottles.
Step 3
What equipment could the student use to measure time?
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The student could use a stopwatch or stop watch to measure the time taken for the energy transfer process. This allows for accurate timing of the experiments.
Step 4
Explain two ways that the student could improve the investigation to be able to make a valid conclusion.
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The student should ensure that the same starting temperature of water is used for each experiment, so the initial thermal conditions are consistent across all trials.
The student could also repeat the investigation multiple times and calculate mean values for the temperature readings. This would help to reduce the impact of random errors and provide a more reliable set of data.
Step 5
What type of graph should the student have plotted?
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The student should have plotted a bar chart. This is appropriate for comparing different insulating materials since the data represents discrete categories rather than continuous variables.
