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    In this activity, students observe the teacher demonstrating changes in the properties of common substances when cooled with liquid nitrogen.

    By the end of this activity, students should be able to:

    • realise that the properties of materials are often temperature-sensitive
    • recognise that the boiling point of liquid nitrogen is extremely low
    • show awareness of the potential hazards that exposure to liquid nitrogen can invoke
    • explain in simple terms the reason behind the main changes occurring in each of the demonstrations.

    Download the Word file (see link below) for:

    • introduction/background notes
    • instructions on what you need and what to do
    • discussion questions
    • ideas for extending your students.
      Published 30 April 2010 Referencing Hub articles