Thermal insulators

• Who is demonstrating the installation required practical for GCSE physics?

  1. Reese
• What materials are needed for the insulation experiment?

  Beaker and bubble wrap
• How can you secure the bubble wrap around the beaker?

  Using an elastic band
• How many layers of insulation can you build up?

  Two, four, six, or eight layers
• What is the purpose of the insulation in the experiment?

  To reduce heat loss due to conduction
• What does the cardboard lid do in the experiment?

  Reduces energy loss due to convection
• What is the starting temperature of the water in the experiment?

  85 degrees Celsius
• What should you do to ensure a fair test when filling the cans?

  Use the same amount of water each time
• What is plotted on the graph after the experiment?

  Temperature on the y-axis and time on the x-axis
• What happens to the temperature of the can with no insulation?

  It decreases rapidly
• Which can has the best insulation after the experiment?

  The can with eight layers of insulation
• Why does the can with eight layers of insulation perform better?

  Conduction is reduced more effectively
• What is the main factor that reduces heat loss in this experiment?

  Reduction of vibrations transferred to air
• What should you do if you have five minutes to spare during the experiment?

  Start the next can off simultaneously
• What is the purpose of using a thermometer in the experiment?

  To measure the temperature of the water
• What is the expected outcome for the can with the most insulation?

  It will lose heat the slowest
• How does the insulation affect the transfer of energy?

  It reduces energy loss to the environment