A thermometer is calibrated in degrees Celsius, with scale markings ranging from −20∘C-20^\circ\text{C}−20∘C to 120∘C120^\circ\text{C}120∘C.
What are the values of the lower fixed point and of the upper fixed point on the Celsius scale?
Lower fixed point = −20∘C-20^\circ\text{C}−20∘C, Upper fixed point = 120∘C120^\circ\text{C}120∘C
Lower fixed point = 0∘C0^\circ\text{C}0∘C, Upper fixed point = 100∘C100^\circ\text{C}100∘C
Lower fixed point = 0∘C0^\circ\text{C}0∘C, Upper fixed point = 120∘C120^\circ\text{C}120∘C
Lower fixed point = −20∘C-20^\circ\text{C}−20∘C, Upper fixed point = 100∘C100^\circ\text{C}100∘C
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.