Heat Transfer-PowerPoint Presentation
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HOW IS HEAT TRANSMITTED? By: Geovani Jarrett
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Transcript of Heat Transfer-PowerPoint Presentation
HOW IS HEAT
TRANSMITTED?By: Geovani Jarrett
Created by: Geovani Jarrett 2
Objectives Examine how heat is transmitted from
one location to anther through conduction, convection and radiation.
Examine the effect of heat on various materials.
Display an awareness of safety for self and others.
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Created by: Geovani Jarrett 3
Definition of Key Terms
Heat - the state of a body perceived as having or generating a relatively high degree of warmth.
Conduction - the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.
Convection - the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Radiation - energy that comes from a source and travels through some material or through space and then absorbed by another body.
Insulator- A material that prevents the loss of heat
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Created by: Geovani Jarrett 4
Heat Transfer Heat always moves from a warmer
place to a cooler place.
Heat transfers in three ways:ConductionConvectionRadiation
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Created by: Geovani Jarrett 5
Conduction Conduction is the transfer of heat between two
parts of a stationary system, caused by a temperature difference between the parts.
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Created by: Geovani Jarrett 6
Convection Convection is the transfer of heat by the
circulation or movement of the heated parts of a liquid or gas.
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Cooler water sinks
Cools at the surface
Convection current
Hot water rises
Created by: Geovani Jarrett 7
Radiation Radiation is the complete process in which
energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body.
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?
Created by: Geovani Jarrett 8
Review Questions What is meant by conduction? What are the 3 ways in which heat is
transferred? Give examples of convection. What name is given to the process in
which heat travels through space?
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HOMEWORK ASSESSMENT
Wear protective clothing for example goggles. Use insulated equipment. Wear protective clothing. Have an extinguishing agent ready. Use ultraviolet absorbent lenses Use sun screen Wear a hat Cover up Limit exposure
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Write a list of ways in which you can protect yourself from heat.
Created by: Geovani Jarrett 10
THAT’S ALL FOLKS
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