Question

Describe the structure of a thermometer.

Answer 1

• A thermometer consists of a narrow glass tube with a bulb at one end.
• The bulb contains a thermometric liquid such as mercury or coloured alcohol.
• The liquid rises or falls through a fine capillary tube when the temperature changes.
• A graduated scale is marked beside the tube to measure temperature.
• The scale may be marked in degrees Celsius (°C) and/or degrees Fahrenheit (°F).
• The glass tube is usually fixed on a supporting board or frame for easy reading.