Thermal Energy (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Condition needed for heat transfer
Condition needed for heat transfer
Temperature difference between two areas
Heat flow direction
Heat flow direction
Higher to lower temperature
3 methods of heat transfer
3 methods of heat transfer
Conduction, convection, radiation
Conduction definition
Conduction definition
Heat travels through solids
Why conduction works in solids
Why conduction works in solids
Particles tightly packed, vibrations pass energy
Why metals conduct heat well
Why metals conduct heat well
Free electrons carry energy
Convection definition
Convection definition
Heat transfer in fluids by fluid movement
Convection occurs in
Convection occurs in
Fluids (liquids and gases)
Why heated fluid rises
Why heated fluid rises
Expands and becomes less dense
Convection current cause
Convection current cause
Warm fluid rises, cool fluid sinks
Radiation definition
Radiation definition
Heat transfer via electromagnetic waves/infrared
Radiation unique property
Radiation unique property
No medium needed, works in vacuum
Temperature effect on radiation
Temperature effect on radiation
Hotter objects emit more radiation
Insulation purpose
Insulation purpose
Reduces rate of heat transfer
Why air is poor conductor
Why air is poor conductor
Particles far apart