When calibrating a liquid-in-glass thermometer to measure temperature on the Celsius scale, two standard fixed points are typically chosen. If the lower fixed point is defined by pure melting ice, which of the following represents the correct upper fixed point?
the temperature of boiling salty water
the average temperature of a healthy human body
the temperature of steam above pure boiling water at standard atmospheric pressure
the temperature inside a typical oven on medium heat
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.