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Identifying Sources of Error: Practice
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| Rock | Scale reading (kg) | Kit value (kg) |
|---|---|---|
| A | 0.8 | 0.5 |
| B | 1.3 | 1.0 |
| C | 0.6 | 0.3 |
| D | 1.1 | 0.8 |
Question 1
A student weighs four rock samples on a kitchen scale and compares her results to the values printed in the science kit: Rock A 0.8 kg (kit says 0.5) | Rock B 1.3 kg (kit says 1.0) | Rock C 0.6 kg (kit says 0.3) | Rock D 1.1 kg (kit says 0.8). She then notices the scale reads 0.3 kg even with nothing on it. What is the most likely source of error?
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