• Fill up the beaker with20ml (±1ml) of water.
• Turn on the thermometer and set it to ˚C unit of measurement.
• Unfold it in a reversed V shape. Immerge the metal stick into the 20ml of water and rest the thermometer into the beaker.
• Write down the temperature displayed on the thermometer as T0, which should be 20˚C (±1˚C ).