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4118823
Heat and Temperature
Description
GCSE Science (Physics) Mind Map on Heat and Temperature, created by Laura THOMAS0798 on 25/11/2015.
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science
physics
gcse
Mind Map by
Laura THOMAS0798
, updated more than 1 year ago
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Created by
Laura THOMAS0798
almost 9 years ago
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Resource summary
Heat and Temperature
Heat and Temperature
Heat is a measure of energy
Temperature is a measure of hotness
Energy flows from hot to cold
Kinetic Theory
Solids
Strong forces of attraction
Vibrate around fixed positions
Low energy
Liquids
Weaker forces of attraction
Move randomly
More energy
Slowly
Gases
Almost no attraction
Move randomly
Very fast
A lot more energy
Conduction
Occurs mainly in solids
CONDUCTION OF HEAT
Vibrating particles pass on kinetic energy to particles next to them
Metals are the best
Free electrons
Liquids and gases conduct heat much slower
No free electrons
Convection
Occurs in liquids and gases
CONVECTION CURRENTS
Particles with a lot of energy move to the cooler region, and take their heat with them
Heat Radiation
The emission of electromagnetic waves
Depends on the surface colour and texture
Dark, matte surfaces absorb and emit
Shiny, silvered surfaces reflect heat
Condensation and Evaporation
CONDENSATION
When a gas turns to liquid
Rate will increase if:
Temperature is lower
Windspeed is less
Temperature is lower
Density is higher
EVAPORATION
Liquid to gas
Rate will increase if:
Temperature is higher
Density is lower
Surface area is larger
Windspeed is greater
Rate of Heat Transfer
Depends on:
Surface area
Volume
Type of material
Limiting heat transfer
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