BBC Learning Zone Clips

CLIP 28

Measuring temperature - freezing point

Measuring temperature - freezing point
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Key Info
  • Measuring temperature - freezing point
  • Duration: 02:51
  • A presenter based at the British Antarctic Survey, Liz, explains that room temperature is typically 20°C whereas their Cold Room, where ice core samples are stored, is maintained at -26°C. The freezing points of water (0°C), shampoo (-3°C), olive oil (-12°C) and sunflower oil ( 17°C) are then measured by Liz. Frozen food is usually kept at -18°C and Liz explains that a frozen chicken must be defrosted to room temperature before being cooked. This represents a rise in temperature of 38°C (-18°C to 20°C).
  • Subject:

    Maths

       Topic:

    Number Patterns and Sequences

  • Keywords: thermometer, temperature, Celsius, minus, freeze, defrost
Ideas for use in class
  • A good starting point for talking about frozen food, ice, liquids and looking at negative temperatures.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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