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