| Research
Findings |
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| 4)
Students have difficulty identifying the |
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| primary
source of error in an experiment. |
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| Are
nickel coins made of nickel? Find
density: |
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| • | Median density from 76 students = 7.1 g/cm3 |
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| (standard deviation = 10 g/cm3 ) |
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| Density of pure nickel = 8.912 g/cm3 |
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| Density of nickel coin = 8.9 ± 0.4 g/cm3 |
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| (alloy of 25% nickel, 75% copper) |
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