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Question 1
A student is investigating the properties of 4 different metals. A metal drawing pin is attached to one end of the rods using a small amount of Vaseline. The rods are placed on a tripod and heated at one end using a Bunsen burner. The students starts a timer when the Bunsen burner is placed under the rods and records how long it takes for each pin to drop. |
a) | What is the independent variable in the student's investigation?
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b) | What is the dependent variable in the student's investigation?
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c) | The table below shows the student's results. |
c i) | The student's data contains an anomalous result. Which result is an anomaly?
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c ii) | Calculate the average time taken for the pin to drop for each material.
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c iii) | Plot a bar chart of the student's results.
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c iv) | The student concludes that iron is the best conductor of heat because it has the highest time for the pin to drop. Is the student correct?
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d) | Describe how heat travels along the metal rods to cause the pins to drop.
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