A nurse uses a mercury-in-glass, clinical thermometer to measure the temperature of a patient. Fig. 5.1 shows the structure of a clinical thermometer. [Figure 5.1]

1. (a)(i)The clinical thermometer has a small range and a high sensitivity. State what is meant by 1. range, 2. sensitivity.[2]
2. (a)(ii)State and explain one feature of this clinical thermometer that produces a high sensitivity.[2]
3. (b)State the purpose of the constriction in the clinical thermometer.[1]
4. (c)Explain, in terms of the mercury molecules, how an increase in temperature produces an increased reading on the thermometer.[3]

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