This task is about fair testing and plotting results from a data table.
An experiment was set up to compare the rate of cooling of a plasticene sphere and a plasticene cube.
This is what was done:
- Four shapes were made out of plasticene; two cubes and two spheres.
- A thermometer was pushed inside each shape to measure the temperature throughout the experiment. (See the diagrams below).
- A container of hot water was used to heat up the shapes.
- The shapes were removed from the hot water and allowed to cool for 25 minutes.
| a) |
Why were two of each shape used?
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| b) |
What are three variables that should have been kept the same in this experiment?
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| c) |
The results of the experiment are shown on the table below.
Use the data to plot a graph of the results.
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| d) |
Explain the results.
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