A student measures the temperature of a liquid that is kept at a constant temperature. The student takes repeated readings with thermometer X and then with thermometer Y. Each result is recorded as the mean ± the estimated uncertainty.
| Thermometer | Result in °C |
|---|---|
| X | 41.9 ± 0.1 |
| Y | 41.9 ± 0.3 |
Which statement about the repeated readings is correct?
Thermometer Y's readings had a larger range than thermometer X's readings.
Thermometer Y's readings were all within 0.3 °C of each other.
Both sets of readings had the same range because the two means are equal.
Thermometer Y's readings had a higher mean than thermometer X's readings.
95 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.