thermal insulator

• What is the aim of the investigation described?

  To investigate insulation thickness effects
• How does insulating a hot object affect heat loss?

  It reduces the rate of heat loss
• What is the procedure for the insulation investigation?

  • Insulate a container with material
  • Record temperature over time
  • Vary the number of insulation layers
  • Determine relationship between thickness and energy transfer
• What is the independent variable in the investigation?

  Number of layers of insulating material
• What is the dependent variable in the investigation?

  Temperature change of water
• What are the control variables in the investigation?

  • Amount of water in each beaker
  • Starting temperature of the water in each beaker
• 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
• What is the purpose of adding layers of insulation?

  To reduce heat loss
• What type of container is used in the experiment besides beakers?

  Cans
• What happens to the temperature of the cans over 20 minutes?

  The temperature decreases
• What is the starting temperature of the water in the experiment?

  $85 \text{ degrees Celsius}$
• What is the role of the cardboard lid in the experiment?

  To reduce energy loss due to convection
• How does the insulation affect heat loss in the cans?

  More insulation reduces heat loss
• What should be plotted on the graph after the experiment?

  Temperature on the y-axis, time on the x-axis
• Which can had the slowest temperature decrease?

  The can with eight layers of insulation
• Why does the can with eight layers insulate better than two layers?

  It reduces conduction more effectively
• What is the main reason for reduced vibrations in the insulated cans?

  Insulation prevents vibrations from passing to air