Two piece of glass with gap in between filled with a gas or containing a vacuum
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How does double glazing work?
Particles in a gas are far apart -> difficult to transfer energy & no particles in a vacuum -> impossible to transfer energy by conduction
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How is energy loss reduced by loft insulation?
Conduction & convection
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How does loft insulation work?
Fibreglass 'wool' laid across loft floor reduces conduction through ceiling into roof space & Both sides of the ceiling are the SAME temperature so no energy can be transferred by convection
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How is energy loss reduced by cavity wall insulation?
Conduction & convection
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How does cavity wall insulation work?
Two layers of bricks with gap between filled with foam -> air in foam is a good insulator -> air cannot move by convection as it is trapped in the foam
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How is energy loss reduced by insulation blocks?
Radiation
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How do insulation blocks work?
Shiny foil on both sides -> energy from the sun is reflected back (cool home in summer) & energy from the home is reflected back (warm home in winter)
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Other cards in this set
Card 2
Front
Two piece of glass with gap in between filled with a gas or containing a vacuum
Back
What is double glazing?
Card 3
Front
Particles in a gas are far apart -> difficult to transfer energy & no particles in a vacuum -> impossible to transfer energy by conduction
Back
Card 4
Front
Conduction & convection
Back
Card 5
Front
Fibreglass 'wool' laid across loft floor reduces conduction through ceiling into roof space & Both sides of the ceiling are the SAME temperature so no energy can be transferred by convection
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