Thermal Energy (AQA GCSE Physics Combined Science): Flashcards
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Practise the cards
14 cards from this deck
Direction of heat transfer
Direction of heat transfer
From higher to lower temperature
Three heat transfer methods
Three heat transfer methods
Conduction, convection, radiation
Definition of conduction
Definition of conduction
Heat transfer through solids
How conduction spreads heat
How conduction spreads heat
Vibrations pass from particle to particle
Why metals conduct heat well
Why metals conduct heat well
Have free electrons that carry energy
Definition of convection
Definition of convection
Heat transfer through fluids by fluid movement
Effect of heating on fluid density
Effect of heating on fluid density
Expands, becomes less dense, rises
What creates convection current
What creates convection current
Warm fluid rises, cool fluid sinks
Definition of radiation
Definition of radiation
Heat transfer via electromagnetic waves (infrared)
Does radiation need a medium?
Does radiation need a medium?
No, can occur in a vacuum
What all objects emit
What all objects emit
Thermal radiation based on temperature
How insulation works
How insulation works
Reduces rate of heat transfer
Why air is a poor conductor
Why air is a poor conductor
Particles are far apart
How double glazing works
How double glazing works
Traps air between glass panes