Heat Transfer.

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Presentation transcript:

Heat Transfer

Prediction What type of heat transfer is demonstrated by each of the following? Hot air popper: _________________________ Hot plate: __________________________ Microwave: __________________________

Experiment #1 – Hot air popper Explain how/why the kernels were able to pop. Use heat flow and kinetic energy in your answer. What type of heat transfer is this? Draw a picture of this type of heat flow.

Experiment #2 – Hot plate Explain how/why the kernels were able to pop. Use heat flow and kinetic energy in your answer. What type of heat transfer is this? Draw a picture of this type of heat flow. What areas of the atmosphere are heated through this process?

Experiment #3 – Microwave Explain how/why the kernels were able to pop. Use heat flow and kinetic energy in your answer. What type of heat transfer is this? Draw a picture of this type of heat flow.

How? Conduction Convection Radiation Transfer of thermal energy through direct contact Transfer of thermal energy though the movement of particles Transfer of thermal energy through electromag-netic waves

What? Conduction Convection Radiation Solids Liquids Gases Liquids Space

Need a medium? Conduction Convection Radiation Needs a medium A fluid medium must be present No medium needed

Example Conduction Convection Radiation