GCE O-Level Physics Syllabus
Chapter 10: Temperature
Principles of thermometry
(a) Explain how a physical property which varies with temperature, such as volume of liquid column, resistance of metal wire and electromotive force (e.m.f.) produced by junctions formed with wires of two different metals, may be used to define temperature scales.
(b) Describe the process of calibration of a liquid-in-glass thermometer, including the need for fixed points such as the ice point and steam point.