p1 insulators

• What is the main goal of the investigation described in the video?

  To investigate the effectiveness of thermal insulators
• Why is this investigation considered a required practical for triple physics students?

  It teaches essential experimental skills and concepts
• What is the procedure for comparing different thermal insulators?

  1. Place a small beaker inside a larger beaker.
  2. Boil water and transfer 80 cm³ to the small beaker.
  3. Cover with cardboard lid with a thermometer hole.
  4. Record starting temperature and measure every 3 minutes for 15 minutes.
  5. Repeat with insulating materials like bubble wrap.
• What is the volume of hot water used in the small beaker?

  80 cm³
• What is the purpose of the cardboard lid in the experiment?

  To cover the beaker and hold the thermometer
• How often should the temperature be recorded during the experiment?

  Every 3 minutes
• What is the independent variable in this experiment?

  The type of insulating material used
• What is the dependent variable in this experiment?

  The temperature of the water
• What are control variables in this experiment?

  Volume of water and mass of insulating material
• Why is it important to keep the starting temperature of the water the same?

  To ensure fair comparison of insulation effectiveness
• How can cooling curves be used in this investigation?

  • Plot temperature against time for each insulator.
  • Identify which insulator keeps water warmest.
  • Compare effectiveness of different materials visually.
• How does the thickness of a material affect thermal insulation?

  • More layers provide better insulation.
  • Experiment with 2, 4, and 6 layers of newspaper.
  • Measure temperature changes over time.
• What is the independent variable when testing the thickness of insulation?

  The number of layers of newspaper
• What is the expected result when increasing the number of newspaper layers?

  Water cools down more slowly
• What are the control variables when testing the thickness of insulation?

  Starting temperature and volume of water
• What conclusion can be drawn from the results of the insulation experiment?

  More layers are more effective insulators
• What should you do if you want to test a new insulating material?

  • Use the same procedure as before.
  • Ensure consistent volume and starting temperature.
  • Record and compare results with previous materials.