Thermal Energy (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
Direction heat naturally flows
Direction heat naturally flows
From higher to lower temperature
Three methods of heat transfer
Three methods of heat transfer
Conduction, convection, radiation
Heat transfer method through solids
Heat transfer method through solids
Conduction
Why does conduction occur in solids
Why does conduction occur in solids
Particles tightly packed in fixed positions
What increases when particles are heated in conduction
What increases when particles are heated in conduction
Kinetic energy
Why metals are excellent heat conductors
Why metals are excellent heat conductors
Have free electrons that carry energy
Heat transfer in fluids by movement
Heat transfer in fluids by movement
Convection
What happens to a fluid's density when heated
What happens to a fluid's density when heated
Becomes less dense
What is a convection current
What is a convection current
Pattern of rising warm & sinking cool fluid
Heat transfer via electromagnetic waves
Heat transfer via electromagnetic waves
Radiation
Does radiation need a medium
Does radiation need a medium
No, can occur in a vacuum
How does temperature affect radiation emitted
How does temperature affect radiation emitted
Hotter objects emit more radiation
What insulation does to heat transfer
What insulation does to heat transfer
Reduces the rate
Why air is a poor heat conductor
Why air is a poor heat conductor
Particles are far apart
How double glazing reduces heat transfer
How double glazing reduces heat transfer
Traps air between two panes of glass