This task is about fair testing insulation.
| Sarai set up an experiment to investigate the effect of house insulation. She made models of two houses – one that was insulated, and one that was not insulated. She used a cardboard box as a house and a sealed container of hot water as a "heater" to warm the house. This diagram shows a section of Sarai's insulated house with its side and roof removed. |
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How would the walls be different in Sarai's non-insulated house?
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| b) |
Describe three things Sarai would need to keep the same to make her investigation a "fair test".
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This graph shows Sarai's temperature readings in her non-insulated house.
On the same graph, draw a line to show how Sarai's temperature readings would be different for the insulated house.
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