heat transfers. heat transfer - the transfer of thermal energy between substances due to a...
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HEAT TRANSFERS
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HEAT TRANSFER - the transfer of thermal
energy between substances due to a difference in their
temperature
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THERMAL ENERGY is the total of all the kinetic and potential energy of all the particles in a substance.
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TEMPERATURE is a measurement of the average kinetic energy of the molecules in an object. It is measured with a thermometer. It is a measurement of the internal energy contained in an object.
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As the temperature increases, so does thermal energy (because the kinetic
energy of the particles increased).
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The flow of thermal energy
(HEAT) always flows from warmer to
cooler objects
Cup gets cooler while hand gets
warmer
Ice gets warmer while hand gets
cooler
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Questions
1. What is thermal energy?2. How do you measure thermal energy?3. What is heat? 4. How does thermal energy flow?
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Insert video clip – conduction, convection & radiation
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CONDUCTION is the
transfer of heat through
a material by direct contact.
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CONVECTION is the
transfer of heat in a
fluid (gas or liquid) as a
result of the movement of the fluid
itself
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RADIATION is the transfer of heat via
electromagnetic waves
through space
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How Are They Alike?
Conduction
Convection
Radiation
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How Are They Different?
Conduction
Convection
Radiation