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- radiation
- heat is emitted from a body
- radiant energy flows through air
- short wave length (intense rays)
- long wave length (much less intense)
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- conduction
- heat movement from one molecule to another
- touching objects seek equilibrium
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- convection
- heat is transferred from one point to another
- molecules move away from heat source (expansion)
- vertical movement of heat
- e.g. afternoon thunderstorms
- "advection" - horizontal heat transfer
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