All Science Fair Projects

1. For this science fair project, the independent variable is the type of thermometer used - mercury or glass, a digital thermocouple thermometer and an infrared thermometer. The dependent variable is the temperature measured using the 3 thermal devices. This is determined by using the thermometers to measure the temperature. The constants (control variables) are the room temperature and the time of the measurements.

2. The beaker is filled with water and placed on the hot plate. Its temperature is then raised and maintained at 37 °C. The temperature of the water is  taken  using the mercury glass thermometer, a digital thermocouple thermometer and an infrared thermometer. The observed  temperatures are recorded in the table given below.

3. The infrared thermometer is used to  take the participant’s temperature inside the ear and the  reading is recorded in the table below.

4. The temperature inside the participant’s mouth and under his armpit, is  taken using the mercury glass thermometer, a digital thermocouple thermometer and an infrared thermometer. The readings taken using the infrared thermometer must be taken quickly because once the mouth is opened or the arm raised, the temperature will begin to fall.